If this is any part of an actual system, and not just a programming assignment, you will be well served to stay away from floating point numbers when adding currencies. See What Every Scientist Should Know About Floating-Point Arithmetic or search the monastery for floating point accuracy.

One thing that you can do is do your calculations in cents, and only do the conversion for display purposes ($cents / 100).

Update: Update to more long-lived link. Thanks to HalNineThousand below.

--MidLifeXis

In reply to Re: Force currency view by MidLifeXis
in thread Force currency view by htmanning

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