multiply cells if not blank

[MartinL]

This has got to be an array formula, hasn't it?

In the following example I need to
Sum the results of all the
multiply An*Bn to get a single answer:

so something like if(B2:B13<>"",sum(B2:B13*A2:A13))
bet that makes no sense to anyone ...

multiply cells if not blank

Sheet2

<TABLE style="BACKGROUND-COLOR: #ffffff; PADDING-LEFT: 2pt; PADDING-RIGHT: 2pt; FONT-FAMILY: Calibri,Arial; FONT-SIZE: 11pt" border=1 cellSpacing=0 cellPadding=0><COLGROUP><COL style="WIDTH: 30px; FONT-WEIGHT: bold"><COL style="WIDTH: 64px"><COL style="WIDTH: 64px"><COL style="WIDTH: 64px"><COL style="WIDTH: 64px"></COLGROUP><TBODY><TR style="TEXT-ALIGN: center; BACKGROUND-COLOR: #cacaca; FONT-SIZE: 8pt; FONT-WEIGHT: bold"><TD></TD><TD>A</TD><TD>B</TD><TD>C</TD><TD>D</TD></TR><TR style="HEIGHT: 18px"><TD style="TEXT-ALIGN: center; BACKGROUND-COLOR: #cacaca; FONT-SIZE: 8pt">2</TD><TD style="TEXT-ALIGN: right">24</TD><TD style="TEXT-ALIGN: right">15</TD><TD></TD><TD></TD></TR><TR style="HEIGHT: 18px"><TD style="TEXT-ALIGN: center; BACKGROUND-COLOR: #cacaca; FONT-SIZE: 8pt">3</TD><TD></TD><TD></TD><TD></TD><TD></TD></TR><TR style="HEIGHT: 18px"><TD style="TEXT-ALIGN: center; BACKGROUND-COLOR: #cacaca; FONT-SIZE: 8pt">4</TD><TD style="TEXT-ALIGN: right">66</TD><TD></TD><TD></TD><TD></TD></TR><TR style="HEIGHT: 18px"><TD style="TEXT-ALIGN: center; BACKGROUND-COLOR: #cacaca; FONT-SIZE: 8pt">5</TD><TD style="TEXT-ALIGN: right">63</TD><TD></TD><TD></TD><TD></TD></TR><TR style="HEIGHT: 18px"><TD style="TEXT-ALIGN: center; BACKGROUND-COLOR: #cacaca; FONT-SIZE: 8pt">6</TD><TD></TD><TD></TD><TD></TD><TD></TD></TR><TR style="HEIGHT: 18px"><TD style="TEXT-ALIGN: center; BACKGROUND-COLOR: #cacaca; FONT-SIZE: 8pt">7</TD><TD style="TEXT-ALIGN: right">60</TD><TD></TD><TD></TD><TD></TD></TR><TR style="HEIGHT: 18px"><TD style="TEXT-ALIGN: center; BACKGROUND-COLOR: #cacaca; FONT-SIZE: 8pt">8</TD><TD></TD><TD></TD><TD></TD><TD></TD></TR><TR style="HEIGHT: 18px"><TD style="TEXT-ALIGN: center; BACKGROUND-COLOR: #cacaca; FONT-SIZE: 8pt">9</TD><TD style="TEXT-ALIGN: right">50</TD><TD style="TEXT-ALIGN: right">8</TD><TD></TD><TD></TD></TR><TR style="HEIGHT: 18px"><TD style="TEXT-ALIGN: center; BACKGROUND-COLOR: #cacaca; FONT-SIZE: 8pt">10</TD><TD style="TEXT-ALIGN: right">52</TD><TD></TD><TD></TD><TD></TD></TR><TR style="HEIGHT: 18px"><TD style="TEXT-ALIGN: center; BACKGROUND-COLOR: #cacaca; FONT-SIZE: 8pt">11</TD><TD style="TEXT-ALIGN: right">54</TD><TD></TD><TD></TD><TD></TD></TR><TR style="HEIGHT: 18px"><TD style="TEXT-ALIGN: center; BACKGROUND-COLOR: #cacaca; FONT-SIZE: 8pt">12</TD><TD style="TEXT-ALIGN: right">54</TD><TD></TD><TD></TD><TD></TD></TR><TR style="HEIGHT: 18px"><TD style="TEXT-ALIGN: center; BACKGROUND-COLOR: #cacaca; FONT-SIZE: 8pt">13</TD><TD style="TEXT-ALIGN: right">22</TD><TD></TD><TD></TD><TD></TD></TR><TR style="HEIGHT: 18px"><TD style="TEXT-ALIGN: center; BACKGROUND-COLOR: #cacaca; FONT-SIZE: 8pt">14</TD><TD></TD><TD></TD><TD></TD><TD style="TEXT-ALIGN: right">360</TD></TR><TR style="HEIGHT: 18px"><TD style="TEXT-ALIGN: center; BACKGROUND-COLOR: #cacaca; FONT-SIZE: 8pt">15</TD><TD></TD><TD></TD><TD></TD><TD style="TEXT-ALIGN: right">400</TD></TR><TR style="HEIGHT: 18px"><TD style="TEXT-ALIGN: center; BACKGROUND-COLOR: #cacaca; FONT-SIZE: 8pt">16</TD><TD></TD><TD></TD><TD style="FONT-WEIGHT: bold">answer:</TD><TD style="TEXT-ALIGN: right; FONT-WEIGHT: bold">760</TD></TR></TBODY></TABLE>
<TABLE style="BORDER-BOTTOM-STYLE: groove; BORDER-BOTTOM-COLOR: #00ff00; BORDER-RIGHT-STYLE: groove; BACKGROUND-COLOR: #fffcf9; BORDER-TOP-COLOR: #00ff00; FONT-FAMILY: Arial; BORDER-TOP-STYLE: groove; COLOR: #000000; BORDER-RIGHT-COLOR: #00ff00; FONT-SIZE: 10pt; BORDER-LEFT-STYLE: groove; BORDER-LEFT-COLOR: #00ff00"><TBODY><TR><TD>Spreadsheet Formulas</TD></TR><TR><TD><TABLE style="FONT-FAMILY: Arial; FONT-SIZE: 9pt" border=1 cellSpacing=0 cellPadding=2><TBODY><TR style="BACKGROUND-COLOR: #cacaca; FONT-SIZE: 10pt"><TD>Cell</TD><TD>Formula</TD></TR><TR><TD>D14</TD><TD>=A2*B2</TD></TR><TR><TD>D15</TD><TD>=A9*B9</TD></TR><TR><TD>D16</TD><TD>=SUM(D14:D15)</TD></TR></TBODY></TABLE></TD></TR></TBODY></TABLE>

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[Aladin Akyurek]

I'd think...

=SUMPRODUCT(A2:A13,B2:B13)

would suffice.

 

[MartinL]

Aladin,

You have a real knack at making me feel thick