Math? IF Statements. Multiple scenarios - math

Question

This is not high level Math, but I am struggling to apportion the appropriate amounts to my upsell types.
Type Revenue Sales Units
1st Position 24 3 3
2nd Position1 10 2
2nd Position2 5 1
Only my 1st positions count toward the return per sale values and they include the revenue of my 2nd positions that were generated from that sale.
IMPORTANT NOTE: If the return per sale value is greater than or equal to 12 I must apply a split for the amount over 12. My less than 12 value is *0.6 of the revenue, my greater than 12 value is *0.6 of amount less than 12 and *0.4 of amount over.
IF TotalRev/1st Position Units < 12 THEN TotalRev*.6 ELSE 7.2+(((TotalRev)/1stPositionUnits)-12)*.4)*1stPositionUnits = Total Revenue To Company.
IF (24+10+5)/3 < 12
THEN (24+10+5)*.6
ELSE ((.6*12)+((((24+10+5)/3)-12)*.4))*3
Net Revenue = 22.8
Net Return Per Sale = (Net Revenue/1st Position Units) = (22.8/3) = 7.6
Now I want to determine how much of the 1st position revenue contributed to the 7.6, how much of the 2nd position1 revenue and how much of the 3rd position...
My Attempt:
(1st Position Revenue/Total Revenue)*Net Return Per sale = (24/(24+10+5))*7.6 = 4.68
(2nd Position1 Revenue/Total Revenue)*Net Return Per sale = (10/(24+10+5))*7.6 = 1.95
(2nd Position2 Revenue/Total Revenue)*Net Return Per sale = (5/(24+10+5))*7.6 = 0.97
Double Check = (4.68+1.95+0.97) = 7.6

Answer 1

As your question, I guess this should be OK in your case.
Assuming the variables are defined with the same name as they are in the question(e.g., rev_1st_pos,rev_2nd_pos1,rev_2nd_pos2,new_rev_1st_pos,new_rev_2nd_pos1,new_rev_2nd_pos2,net_rev,net_return_per_sale,unit_1st_pos)...
The usual meanings for all the variables are :-
rev_1st_pos=Revenue of 1st Position
rev_2nd_pos1=Revenue of 2nd Position1
rev_2nd_pos2=Revenue of 2nd Position2
new_rev_1st_pos=New Revenue of 1st Position after total calculation
new_rev_2nd_pos1=New Revenue of 2nd Position1 after total calculation
new_rev_2nd_pos2=New Revenue of 2nd Position2 after total calculation
unit_1st_pos=1st position Units
net_rev=Net Revenue calculated as shown below
net_return_per_sale=Net Return per sale as calculated below
check= a variable used to check final value equals the net_return_per_sale.
Code :-
total_rev=(rev_1st_pos+rev_2nd_pos1+rev_2nd_pos2);
if((total_rev/unit_1st_pos)>=12)
{
net_rev=((((total_rev/unit_1st_pos)-12)*0.4)+(12*0.6))*unit_1st_pos; // OR simply substitute (12*0.6) by 7.2
}
else
{
net_rev=total_rev*0.6;
}
net_return_per_sale=net_rev/unit_1st_pos;
new_rev_1st_pos=(rev_1st_pos/total_rev)*net_return_per_sale;
new_rev_2nd_pos1=(rev_2nd_pos1/total_rev)*net_return_per_sale;
new_rev_2nd_pos2=(rev_2nd_pos2/total_rev)*net_return_per_sale;
double check=new_rev_1st_pos+new_rev_2nd_pos1+new_rev_2nd_pos2; // here check must be equal to net_return_per_sale
If there is still some issue,please leave a comment!