Hi & welcome,
I would suggest a pivot table will do exactly what you need.
Pop the Make and Model as Row items and then the Price as a Data item (it should default to Sum).
You might need to take subtotalling off on the Make and/or Model field for it to show how you want. Double click on the field name and select Subtotals...None to do this.
It ends up like this when I did it:
<table style="width: 156pt; border-collapse: collapse;" x:str="" border="0" cellpadding="0" cellspacing="0" width="208"><colgroup><col style="width: 86pt;" width="114"><col style="width: 44pt;" width="59"><col style="width: 26pt;" width="35"></colgroup><tbody><tr style="height: 12.75pt;" height="17"><td class="xl22" style="border-style: solid none none solid; border-color: black rgb(235, 233, 237) rgb(235, 233, 237) black; border-width: 0.5pt medium medium 0.5pt; width: 86pt; height: 12.75pt; background-color: transparent;" height="17" width="114">Sum of Price</td><td class="xl23" style="border-style: solid none none; border-color: black rgb(235, 233, 237) rgb(235, 233, 237); border-width: 0.5pt medium medium; width: 44pt; background-color: transparent;" width="59">
</td><td class="xl24" style="border-style: solid solid none; border-color: black black rgb(235, 233, 237); border-width: 0.5pt 0.5pt medium; width: 26pt; background-color: transparent;" width="35">
</td></tr><tr style="height: 12.75pt;" height="17"><td class="xl22" style="border-style: solid none none solid; border-color: black rgb(235, 233, 237) rgb(235, 233, 237) black; border-width: 0.5pt medium medium 0.5pt; height: 12.75pt; background-color: transparent;" height="17">Make</td><td class="xl22" style="border-style: solid none none solid; border-color: black rgb(235, 233, 237) rgb(235, 233, 237) black; border-width: 0.5pt medium medium 0.5pt; background-color: transparent;">Model</td><td class="xl24" style="border-style: solid solid none; border-color: black black rgb(235, 233, 237); border-width: 0.5pt 0.5pt medium; background-color: transparent;">Total</td></tr><tr style="height: 12.75pt;" height="17"><td class="xl22" style="border-style: solid none none solid; border-color: black rgb(235, 233, 237) rgb(235, 233, 237) black; border-width: 0.5pt medium medium 0.5pt; height: 12.75pt; background-color: transparent;" height="17">Corolla</td><td class="xl22" style="border-style: solid none none solid; border-color: black rgb(235, 233, 237) rgb(235, 233, 237) black; border-width: 0.5pt medium medium 0.5pt; background-color: transparent;">X</td><td class="xl24" style="border-style: solid solid none; border-color: black black rgb(235, 233, 237); border-width: 0.5pt 0.5pt medium; background-color: transparent;" x:num="" align="right">300</td></tr><tr style="height: 12.75pt;" height="17"><td class="xl25" style="border-style: none none none solid; border-color: rgb(235, 233, 237) rgb(235, 233, 237) rgb(235, 233, 237) black; border-width: medium medium medium 0.5pt; height: 12.75pt; background-color: transparent;" height="17">
</td><td class="xl26" style="border-style: none none none solid; border-color: rgb(235, 233, 237) rgb(235, 233, 237) rgb(235, 233, 237) black; border-width: medium medium medium 0.5pt; background-color: transparent;">Y</td><td class="xl27" style="border-style: none solid; border-color: rgb(235, 233, 237) black; border-width: medium 0.5pt; background-color: transparent;" x:num="" align="right">300</td></tr><tr style="height: 12.75pt;" height="17"><td class="xl22" style="border-style: solid none none solid; border-color: black rgb(235, 233, 237) rgb(235, 233, 237) black; border-width: 0.5pt medium medium 0.5pt; height: 12.75pt; background-color: transparent;" height="17">Ford</td><td class="xl22" style="border-style: solid none none solid; border-color: black rgb(235, 233, 237) rgb(235, 233, 237) black; border-width: 0.5pt medium medium 0.5pt; background-color: transparent;">X</td><td class="xl24" style="border-style: solid solid none; border-color: black black rgb(235, 233, 237); border-width: 0.5pt 0.5pt medium; background-color: transparent;" x:num="" align="right">250</td></tr><tr style="height: 12.75pt;" height="17"><td class="xl25" style="border-style: none none none solid; border-color: rgb(235, 233, 237) rgb(235, 233, 237) rgb(235, 233, 237) black; border-width: medium medium medium 0.5pt; height: 12.75pt; background-color: transparent;" height="17">
</td><td class="xl26" style="border-style: none none none solid; border-color: rgb(235, 233, 237) rgb(235, 233, 237) rgb(235, 233, 237) black; border-width: medium medium medium 0.5pt; background-color: transparent;">Z</td><td class="xl27" style="border-style: none solid; border-color: rgb(235, 233, 237) black; border-width: medium 0.5pt; background-color: transparent;" x:num="" align="right">700</td></tr><tr style="height: 12.75pt;" height="17"><td class="xl22" style="border-style: solid none none solid; border-color: black rgb(235, 233, 237) rgb(235, 233, 237) black; border-width: 0.5pt medium medium 0.5pt; height: 12.75pt; background-color: transparent;" height="17">VolksWagen</td><td class="xl22" style="border-style: solid none none solid; border-color: black rgb(235, 233, 237) rgb(235, 233, 237) black; border-width: 0.5pt medium medium 0.5pt; background-color: transparent;">Y</td><td class="xl24" style="border-style: solid solid none; border-color: black black rgb(235, 233, 237); border-width: 0.5pt 0.5pt medium; background-color: transparent;" x:num="" align="right">850</td></tr><tr style="height: 12.75pt;" height="17"><td class="xl28" style="border-style: solid none solid solid; border-color: black rgb(235, 233, 237) black black; border-width: 0.5pt medium 0.5pt 0.5pt; height: 12.75pt; background-color: transparent;" height="17">Grand Total</td><td class="xl29" style="border-style: solid none; border-color: black rgb(235, 233, 237); border-width: 0.5pt medium; background-color: transparent;">
</td><td class="xl30" style="border: 0.5pt solid black; background-color: transparent;" x:num="" align="right">2400</td></tr></tbody></table>
Hope it helps,
Dom