5 decimal places precision

It certainly seems reasonable to me, if you are calcuating to pennies. To be on the safe side, you could always round up/down (to the nearest penny) in favor of the customer. You could absorb the penny/per cost and raise your rate by a penny :-). If you need more accuracy, look at xs outputs faster than perl can keep up and use MPFR to as many decimal places of precision you want.

I'm not really a human, but I play one on earth. Cogito ergo sum a bum

In reply to Re^3: Decimal Arithmetic by zentara
in thread Decimal Arithmetic by gcoates

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