Diana manages a small factory that manufactures shoes. She would like to purchase all new machines to increase the speed of production and the number of shoes produced each week. Due to the high price of the new machines, it would take Diana a full year to make a prot again. She would have to raise the price of the shoes b1 order to be protable sooner. 5. Why might a business owner compare marginal costs and marginal benets when making an economic decision