Formulas for profit-loss-discount
Students need not memorize 20+ formulas anymore for the topics profit-loss, discount, and tax.
`text(Profit%) = 100 xx` `(text(SalePrice)-text(CostPrice))``//text(CostPrice)`
`text(Discount%) = 100 xx` `(text(MarkedPrice)-text(SalePrice))``//text(MarkedPrice)`
`text(Tax%) = 100 xx` `(text(BilledPrice)-text(SalePrice))``//text(SalePrice)`
All these three formulas are very similar and has a simple explanation to the terms in numerator and denominator.
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