please do both parts in 40 minutes please urgently... I'll give you up thumb definitely

Part 1 John sells pushchairs on eBay. He buys the pushchair from China at a wholesale price of 350 and resells them for 450. He also needs to store them before they are buying dispatched so he rented a garage space for 800 a month. a. What is the equation to calculate the profit? b. How many pushchairs does John need to sell to break even? C. If John were to sell 23 pushchairs, what would be his profit/loss? Part 2 Hector has a 1 shop. Everything he sells is sold for 1 and everything he buys cost 0.90. The rent for the store is 2000 a month. a. What is the equation to calculate the profit? b. How many items does hector need to sell to break even? c. If Hector were to sell 15,000 items, what would be his profit/loss