Find the total cost

Kelly buys 3 videos games that costs $18.96 each. She also buys 2 pairs of earbuds that cost $11.50 each. She has a coupon for $2 off the price of each video game. Kelly uses a calculator as shown to find that the total cost of the item is $77.85. The cashier tells her that the total costs is $73.88. Who is correct? Justify your argument.

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Total Cost = 3 games at $16.96 each + 2 earbuds at $11.50 each
= 3(18.96 - 2) + 2(11.50)
= 50.88 + 23
= 73.88

The cashier is correct. The total cost is $73.88.

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