Method: Add all the coupons and Subtract from the bill
Step 1: Sum of all the coupons
=> $0.31 + $0.26 + $0.38 + $0.59 + $1.06 + $0.54 + $0.45 + $0.63 + $0.78 + $0.99.
=>$5.99
Step: Subtract $5.99 from $51.90
Answer is $
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