Please help, this is confusing to me.

Solve this problem using the simplex method. Super Speedy Bike Company makes 3-speed and 10-speed bicycles at two different factories. Factory X produces 16 3-speed and 20 10-speed bikes in one day while Factory Y produces 12 3-speed and 20 10-speed bikes daily. It costs $1000/day to operate Factory X and $800/day to operate Factory Y. An order for 80 3-speed bikes and 140 10-speed bikes has just arrived. How many days should each factory be operated in order to fill this order at a minimum cost? (Give your answers correct to two decimal places.) Factory X should be operated days. Factory Y should be operated days. What is the minimum cost? (Give your answer correct to the nearest dollar.) $