Summing a range and multiplying it by another

[Pauljj]

Morning all,

I have a feeling that SUMPRODUCT is the function I need for this but unsure how best to go about it

Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Jan	Feb
											
1	1	1	1	0.8	0.8	0.8	0.8	0.8	0.8	0.8	0.8
											
3200	1800	2388	1200	1900	2460	3150	1578	3650	6504	6800	4506

I need a formula that will calculate how much money is made, divided by the top row

The dates for this will change ...for example

Cell A1 will contain the start month (which can change)

Cell A2 will contain the finish month(which can also change)

If A1 was Jun and A2 was Feb

I would sum from 1200 to 4506 and multiply it by the numbers directly above.....long winded explanation would be

1200 * 1
1900 * 0.8
2460 *0.8

and so on

Any ideas please ?

Thanks in advance

 

[steve the fish]

Are they dates formatted as months or just text? If text will that span of months ever be longer than 12 months?

 

[AlanY]

this works, but I'm sure there is a better solution

Book1
	A	B	C	D	E	F	G	H	I	J	K	L
1	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Jan	Feb
2	1	1	1	1	0.8	0.8	0.8	0.8	0.8	0.8	0.8	0.8
3	3200	1800	2388	1200	1900	2460	3150	1578	3650	6504	6800	4506
4
5	Jun
6	Feb
7	25638.4
Sheet1

Cell Formulas
Range	Formula
A7	=SUMPRODUCT(OFFSET(A2,0,MATCH(A5,$A$1:$L$1,0)-1,1,MATCH(A6,$A$1:$L$1,0)-MATCH(A5,$A$1:$L$1,0)+1),OFFSET(A3,0,MATCH(A5,$A$1:$L$1,0)-1,1,MATCH(A6,$A$1:$L$1,0)-MATCH(A5,$A$1:$L$1,0)+1))

 

[Pauljj]

Are they dates formatted as months or just text? If text will that span of months ever be longer than 12 months?

Hello Steve, yes they are text and yes there would be 24 months, the current year and previous year (figures always on rotation) The previous year months would appear as Jan1 Feb1 Mar1 etc etc

 

[Pauljj]

this works, but I'm sure there is a better solution

Book1
	A	B	C	D	E	F	G	H	I	J	K	L
1	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Jan	Feb
2	1	1	1	1	0.8	0.8	0.8	0.8	0.8	0.8	0.8	0.8
3	3200	1800	2388	1200	1900	2460	3150	1578	3650	6504	6800	4506
4
5	Jun
6	Feb
7	25638.4
Sheet1

Cell Formulas
Range	Formula
A7	=SUMPRODUCT(OFFSET(A2,0,MATCH(A5,$A$1:$L$1,0)-1,1,MATCH(A6,$A$1:$L$1,0)-MATCH(A5,$A$1:$L$1,0)+1),OFFSET(A3,0,MATCH(A5,$A$1:$L$1,0)-1,1,MATCH(A6,$A$1:$L$1,0)-MATCH(A5,$A$1:$L$1,0)+1))

Hi Alan, thanks for this, i will give it a go