How to put this condition in Query

Question

Dear experts,
I have a scenario where in the calculation should be dynamic between key figures in query
For example i have a
Target Cost and Actualcost1, Actualcost2, Actualcost3
i need to findout the variance between the Target and Actual
but the catch is that i need to findout the variance with the latest actual cost
1. )  Target cost = 100
Actual cost1=10, Acutal cost2=0, actual cost3=0
then the formula should be Actual cost1-target cost
2. )But if
Target cost  =100
Actual cost1=10, Actual cost2=5, Actual cost3=0
then the formula should be Actual cost2- Target cost
3. Target cost =100
Actual cost1=10, Actual cost2 = 5, Actual cost3= 15
then the formula should be Actual Cost3-Target cost
How to achieve this
Thanks and regards
Neel

Answer 1

Hi Neel,
Do you have indicator saying that a particular actual cost is the latest? If you have any indicator thsi would make the job easy. Else you need to create new formulas to derive the logic.
Else you can proceed with the belwo logic.
1.target cost
2. Actual Costs 1 - Hide
3. Actual Costs 2 - Hide
4. Actual Costs 3 - Hide
5. New formula whcih evaluates the latest.
Write the condition
If Actual costs3 = 0 and actual cost2 = 0 then actual cost1.
else if actual cost2= 0 then actual cost1
else if actual cost1 NE 0 and actual cost2 NE 0 then Actual cost3.
Then hide the above new formula.
And in a new formula you can find the diff between the Target cost and the latest cost derived in teh above new formula.
If the conditions is too big in the above new formula, you can split across two three new formulas and derive the logic.
Just make some changes to the above logic if it is not 100%.
I believe this logic will work.