Question 5: A bookstore bought 100 books for 12.5 million VND. They sold 30% of these books at 100,000 VND each and the rest at 150,000 VND each. What was their total profit? Show your work.

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the amount received after selling 30% of the books is
(100*30%)*100000=3000000 VND
the amount received after selling the remaining books is
(100-100*30%)*150000=105000000 VND
their profit is
(3000000+105000000)-1250000=1000000 VND

 

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