math

The tires mary wants to buy for her car cost $200 per tire. A store is offering the following deal: Buy 3 tires et the 4th tire for 75% off ! Mary will buy 4 tires using the deal . The sales tax is 8%. how much will mary save using the deal versus paying the full price for all 4 tires ?

answer is 162 how did they get pls explain
thank you

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  1. 75% off is 25% = 1/4

    full price = 200*4 * 1.08

    deal price = (200*3 + 50) * 1.08

    subtract

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