Not sure what type of Excel formula (SUM, SUMIF ect…) to use for my calculation, can you get me going in the right direction? [closed]

Question

In Excel Formulas there are so many different functions, that I am not sure which to use to get started. So if I were to give you an example could you point me in the right direction for learning what I need to do?

Ok so say you want 6 Apples (D3) And you want 3 oranges (D4) (also buying 1-7 apples gets you 1 orange free so they only need to pay for 2 oranges but if they buy 8-14 they get 2 oranges free and if they buy 15-21 they would get 3 oranges free and so on and so on. multiples of 7 apples get you a free orange) And 5 grapes (D5) (these are sold by the 3, so no matter if you buy 5 you get charged 2 because these are only sold in 3's) And 4 Bananas (D6) (sold by the each)

So is there a way to formulate this and make it all be one price in I3? The prices are D3=E11, D4=E12, D5=E13 and D6=E14 but for some reason it will not pick anything up past D4=E12, the code stops changing colors when I am putting in the formula.

Not sure if this makes any sense so any help you can give would be greatly appreciated!

Answer 1

If I'm understanding the rules right, I think your formula should be:

=D3*E11  +  MAX(0,D4-ROUNDUP(D3/7,0))*E12  +  ROUNDUP(D5/3,0)*E13  +  D6*E14

I've separated the blocks of calculations to make it easier to read.

I did assume the price you give for grapes (in E13) is for each set of 3 grapes.

(Edited - I just re-read your question - 1 apple gets 1 free orange, 8 apples gets 2 free oranges).