At a cost of $2.50 per square yard, what would be the price of carpeting a rectangular floor, 18 ft x 24 ft?

Answer is: $120

(18ft x 24ft) = 432 square feet

1 yard = 3 feet

1 square yard = (1yd * 1yd) = (3ft * 3ft) = 9 square feet

(432 ft^2) / (9 ft^2 per yard) = 48 square yards

(48 square yards) * ($2.50 per yard) = $120