The final cost of Michael's shirts is $43.88
Let x represent the discounted cost of the total shirt. Since each shirt cost $19.50 and Michael bought 3 shirts, hence:
The total purchase cost = 3 × $19.50 = $58.50
x is the money paid after discount as a result of applying the coupon. Since the coupon took 25% off of the total purchase, hence:
x = $58.50 - (25% of $58.50) = $58.50 - (0.25 × 58.50)
x = $43.88
Therefore the final cost of Michael's shirts is $43.88
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