self Maths Puzzle

Calvin is running a luggage shop. A brand-new item priced at 30% above the cost price did not sell well. So he took 43 dollars off the price, and found that the bags sold very well. If the profit for each bag is now 10% of the cost price, what is the cost price (in dollars)?

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self Other Question

Calvin is trying to finish reading a book with 414 pages in 9 days by reading 1 more page each day than the previous day. How many pages will he end up reading on the last day? A person shoots her wife. Then holds her under water for 5 minutes. Finally, he hangs her. But after 10 minutes they both go out together and enjoy a wonderful dinner together. How can this be?