Add a feature to cashregister class for computing sales tax

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Reference no: EM131309853

Add a feature to the CashRegister class for computing sales tax. The tax rate should be supplied when constructing a CashRegister object. Add recordTaxablePurchase and getTotalTax methods. (Amounts added with recordPurchase are not taxable.) The giveChange method should correctly reflect the sales tax that is charged on taxable items.

Reference no: EM131309853

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