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Answer:
$80
Step-by-step explanation:
The final price of $42 was after a 25% off coupon was applied.
Therefore, $42 is 75% of the price before the coupon was applied.
So cost before coupon applied = 42/75 x 100 = $56
The price of $56 was after the 30% mark down was applied.
Therefore, $56 is 70% of the price before it was marked down.
So cost before mark down applied = 56/70 x 100 = $80