<PRE><B>Question 1107296</B>
(15 * 12) + 5 = 185 inches
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(12 * 12) + 6 = 150 inches
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Area of floor is 185 * 150 = 27750 square inches
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Area of one tile is 12 * 18 = 216 square inches
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Number of tiles needed is 27750/216 = 128.47 approximately 129 tiles
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A box contains 20 tiles, therefore we need 129/20 = 6.45 approximately 7 boxes
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Rocco must buy 7 boxes at a cost of 70 * 7 = $490
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