How much more money did Jane’s store make selling laptops than Bill’s store?
A) 1000
B) 2000
C) 1200
D) 500
E) 250
Answer: B
P = price of one laptop
T = price of one tablet
12P + 8T = 14,000
14P + 6T = 15,500
(12P + 8T = 14,000) × 3
(14P + 6T = 15,500) × 4
36P + 24T = 42,000
56P + 24T = 62,000
−20P = −20,000
P = 1,000
Bill’s store sold 12 laptops → 12 × 1,000 = 12,000
Jane’s store sold 14 laptops → 14 × 1,000 = 14,000
Difference → 14,000 − 12,000 = 2,000
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