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8. (0,5 marks) Article A was sold for 8.400. The selling price was calculated as cost price plus 50%. Article B was sold for 8.400. The selling price was calculated as cost price plus 40%. Which of the following amounts is the total cost price of articles A and B ? a. 7.560 b. 8.960 c. 10.200 d. 11.600

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