Children's clothing store for seasonal promotion, the original price of each blouse 50 yuan, now 20% off sales. Xiaolin bought three pieces, how much did it cost? How much less than the original price?

50 × 80% × 3, = 40 × 3, = 120 (yuan); 50 × 3-120, = 150-120, = 30 (yuan); a: a total of 120 yuan, 30 yuan less than the original price

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