# Conditional Average

#### RAM

##### Well-known Member
I'm looking for a conditional Average in F17.
Book2
ABCDEFG
1Support columns
2Sales tax# of items
3Months in yearMonths in yearMonth of saleMonth of sale
41Jan6Jun8-Jun-077.25%71
52Feb6Jun15-Jun-076.60%75
63Mar1
74Apr1
85May1
96Jun1
107Jul1
118Aug1
129Sep1
1310Oct1
1411Nov1
1512Dec1
16Average Sales tax8 oz IA
176.93%146
Sheet1

Columns A:D are support columns and will be hidden.

G17 sums upp all items for June. I'm looking for the same function in F17 but and Average not a Sum. I have already added a formula in F17, but am a little uncertain it is a good formula.

What do you think? Any inputs?

RAM

### Excel Facts

VLOOKUP to Left?
Use =VLOOKUP(A2,CHOOSE({1,2},\$Z\$1:\$Z\$99,\$Y\$1:\$Y\$99),2,False) to lookup Y values to left of Z values.

#### barry houdini

##### MrExcel MVP
I'm not quite sure why you need to get an average sales tax percentage but I think that if you do it that way you won't take account of the number of items calculated at each percentage. Perhaps

=SUMPRODUCT(--(D4:D15=B9),F4:F15,G4:G15)/G17

#### RAM

##### Well-known Member
I'm not quite sure why you need to get an average sales tax percentage

I know, it looks weird. I'm using it to pull up different accumulated monthly sales to my Profit and Loss sheet using lookups. The above Sheet1 is just a part of my Databas.

I do have different sales taxes for different states and during one month, sales might have happened in different states and the Profit & Loss sheet pulls up the total amount of sales, as in G17 above, for that month selected from the Combo Box in the Profit & Loss sheet. All sales is multiplied with the sales tax and if I have different sales taxes I'm looking at an Average will smooth it out and give me an difference of only a few cents.

Do you still think =SUMPRODUCT(--(D4:D15=B9),F4:F15,G4:G15)/G17 is the better choice?

Do you have a better idea than mine? It is a little rough, I know.

RAM

#### barry houdini

##### MrExcel MVP
I think that my suggestion would be an improvement, because it takes account of the number of sales at each percentage, but to get a more accurate figure you'd need to factor in the actual sale values.

#### RAM

##### Well-known Member
but to get a more accurate figure you'd need to factor in the actual sale values.

Alright, I can add the sales price in the Databas too, not only in the Profit and loss sheet. I call upp all other sales info from the Databas and I can call upp the sales price too.

What do you think now?
Conditional Average.xls
ABCDEFGH
1Support columns
2Sales tax# of itemsRetail Price/item
3Months in yearMonths in yearMonth of saleMonth of sale
41Jan6Jun8-Jun-077.25%71\$ 20.00
52Feb6Jun15-Jun-076.60%75\$ 20.00
63Mar7Jul20-Jul-077.75%28\$ 20.00
74Apr1
85May1
96Jun1
107Jul1
118Aug1
129Sep1
1310Oct1
1411Nov1
1512Dec1
16Average Sales tax8 oz IA
176.92%146
Sheet1

RAM

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