A pack of pretzels costs $4, while a pack of chips is 75% more expensive. Maciek went and bought two packets of chips and two packets of pretzels. How much did he pay for his purchases? Think carefully first, then make a decision:
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One pack of chips is 75 / 100 * 4 = $3 more expensive than a pack of pretzels. That means one pack of chips costs 4 + 3 = $7. So Maciek paid 4 * 2 = $8 for the pretzels. He also paid 7 * 2 = $14 for the chips. In total Maciek paid 8 + 14 = $22 for his purchases. So, the answer is 22.
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