Hello, mnishpsyched..
You also want the VAT to be computed as a percentage _of_ something, and
not hard-coded, so that if you change the price of the pizza, you only
have to change one value (pr_pz) instead of two values pr_pz and tx_tz
(as the second is computed from the first).
You only multiply by coefficients, and these coefficients (the
percentage the state charges) is less likely to change than the costs of
ingredients or your margins (money moves faster than legislation).
--
~Jugurtha Hadjar,
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