Formula that searches for item name and calculates 75th percentile of another variable?

[aefitzgerald]

Hello,

I am trying to pull data from another large spreadsheet (thousands of rows) which is currently sorted to look something like this;

A === B === C === D
Item === Quantity === Price === Running Total Qty.
Apple === 50 === $2.00 === 50
Apple === 100 === $2.25 === 150
Apple === 75 === $2.75 === 225
Banana === 200 === $1.75 === 200
Banana === 300 === $2.00 === 500
Orange === 100 === $0.50 === 100
Orange === 100 === $1.00 === 200
Orange === 250 === $1.25 === 250
Orange === 50 === $1.75 === 300


I am trying to come up with a formula that will allow me to quickly calculate the 75th percentile price for every item in a list, like this:


A === B
Item === 75th percentile price
Apple === $2.75
Banana === $2.00
Orange === $1.25


I am able to calculate the 75th percentile for one particular item name in the large spreadsheet by using a formula like this: LOOKUP(SUM(B2:B4)*0.75,D2:D4,C2:C4). However, I am not sure how to search for the item name in another spreadsheet AND calculate the 75th percentile. How can I quickly perform this calculation for several items at once?

 

[DRSteele]

Welcome to the forum.

I messed around with the native functions and another. They all give different results, but maybe it will work better on a larger set of data.

	A	B	C	D	E
1	Item	Quantity	Price	Running Total Qty.
2	Apple	50	$2.00	50
3	Apple	100	$2.25	150
4	Apple	75	$2.75	225
5	Banana	200	$1.75	200
6	Banana	300	$2.00	500
7	Orange	100	$0.50	100
8	Orange	100	$1.00	200
9	Orange	250	$1.25	250
10	Orange	50	$1.75	300
11
12		75%
13		percentile	percentile.inc	percentile.exc	other
14	Apple	2.500	2.500	2.750	2.500
15	Banana	1.938	1.938	#NUM!	1.938
16	Orange	1.375	1.375	1.625	1.375

<colgroup><col style="width: 25pxpx"><col><col><col><col><col></colgroup><thead>
</thead><tbody>
</tbody>

Sheet1​

Array Formulas Cell Formula B14 {=PERCENTILE(IF($A$2:$A$10=A14,$C$2:$C$10,""),$B$12)} C14 {=PERCENTILE.INC(IF($A$2:$A$10=A14,$C$2:$C$10,""),$B$12)} D14 {=PERCENTILE.EXC(IF($A$2:$A$10=A14,$C$2:$C$10,""),$B$12)} E14 {=PERCENTILE(IFERROR($C$2:$C$10/($A$2:$A$10=A14),""),$B$12)} <thead> </thead><tbody> </tbody> Entered with Ctrl+Shift+Enter. If entered correctly, Excel will surround with curly braces {}. Note: Do not try and enter the {} manually yourself

<tbody>
</tbody>

 

[aefitzgerald]

Thanks for the welcome!

Unfortunately, I think there may be a misunderstanding because those formulas are working but they are not taking quantity into account. I should have made that more clear - my apologies - I want a formula that will go in and find all the data for the item and quickly determine the 75th percentile price among all the quantity sold. So for example there are 500 oranges in the spreadsheet -> so I would want to know the price of the 375th orange in ascending price order.

Any ideas?