Unless you're being paid in cash, there's no need to round. Pennies are still fine with debit, credit cards and cheques in Canada.
Here is a calculaion that may work for you. This calculation only works with 2 decimal points. 75 will not return correctly 75.00 will.
GetAsNumber(Case(X<3;ta & "0";X>2 and X<8;ta & "5"; X=8 ; tc+.02;x=9; tc+.01))