Suppose your database may have initially been built to track customers and the orders they placed. Now you decide to also track marketing efforts and the quantity of customers who use coupons that were mailed or e-mailed to them. You would need to run a(n) to track who redeemed coupons and when they were redeemed.

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"we first find value of tax in dollars.

the difference between the two prices   is: 23. 54 - 22 = 1.54

therefore the sales tax in dollars is 1.54

the tax % will be   (amount of tax / original cost price ) × 100

(1.54 / 22) × 100  → (0.07) × 100 =   7

so the tax rate is 7%

we can double check the answer.

7 % of 22   → (7/100) × 22 → 0.07 × 22 = 1.54

22 + 1.54 = 23.54"

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