Since you don't have any nickels, you have to have an even number of quarters.
Q D
-----------
0 80
2 75
4 70
. .
. .
. .
32 0
You can figure out the missing parts of the table for yourself (you really only need to fill in the first column), then count the rows.
John
Egw to Beta kai to Sigma
My calculator said it, I believe it, that settles it