[AccessD] Query Problem

Guys, I have a query that uses this expression AvgCost:  I'm trying to
add the second line iif([CAT] = 4 to the end of the first line after
[SumOfBillHours] as an additional condition but the number of
parentheses is giving me fits when 

I try to save it. Keeps telling me I have the wrong number of them and I
add and add but to no avail. Anyone see why it won't work. Missing a
parentheses somewhere I guess. The first line works but I needed to add
one more condition.

 

First Line:    AvgCost:
Round(IIf([CAT]=3,[RCOST],IIf([CAT]=1,[RCOST]/[SumOfBillHours],IIf([CAT]
=2,IIf([SumOfBillHours]<=40,[RCOST],(([RCOST]*40)+([SumOfBillHours]-40)*
[OTCOST])/[SumOfBillHours])))),2)

 

Second Line:
IIf([CAT]=4,IIf([SumOfBillHours]<=50,[RCOST],(([RCOST]*50)+([SumOfBillHo
urs]-50)*[OTCOST])/[SumOfBillHours])


 

Steve A.Turner

Controller

Mid-South Engineering Co. Inc.

P.O. Box 1399

1658 Malvern Ave.

Hot Springs, AR 71902

Phone: 501-321-2276

Fax 501-321-4750

Cell 501-282-7751

Email sturner at mseco.com