I'm not sure how much freedom you have to refactor, but you might consider working with integers in pennies instead of floating points in dollars.

Also, while I know nothing of the larger context of your program, I'm not sure you need to round when multiplying an integer quantity (one assumption I'm making). Rounding would be more of a concern in division or multiplying two floats (do you have fractional quantities?).

Consider:

C:\chas_sandbox>perl -le "print +(int((17.95 *3)*100 )/ 100)"
53.84

C:\chas_sandbox>perl -le "print 17.95 *3"
53.85

C:\chas_sandbox>perl -le "print 1795 *3"
5385
[download]

Whatever the case, it's probably wise to follow dragonchild's advice and not fix what isn't broke.