Herz,

I would use the VLOOKUP function with a little trick to allow it for search
with two arguments.

First, I would make a table with all the possible combinations, in your case
10+4+6 rows. Let's say you have Type in column A, class in column B, then add
a calculated column in C with the formula in C2: = A2&B2, then column D with
the cost.

Then, in the area where you want to automatically display the cost, use the
formula: =VLOOKUP(F8&G8,C2:D19,2,0), where F8 is the cell containing the type
and G8 the cell containing the class. C2:D19 represents the range with Type &
Class, costs.

Stephane.