Earn 20% of the original price =120 ÷ (1+20%) =100 yuan.

20% loss of original price =120 ÷ (1-20%) =150 yuan.

Original price+original price = 100+ 150=250 yuan.

Selling price+selling price = 120+ 120=240 yuan.

250 is greater than 240, so it is a loss.

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