Jane buys and sells microwaves. She buys each one for £42 and sells it for £70. She also pays £8 for the delivery of each microwave she sells. If she sells a microwave that is faulty then Jane must pay for its repair and redelivery This costs her another £30 for each faulty microwave. Last month, 7 out of the 88 microwaves Jane sold were faulty. This month she has orders for 125 microwaves. Calculate her expected percentage profit on this month's order. Showing your working in the boxes below may help you present your work.
