Your friend just got an unexpected $1,000 tax refund. She plans to put $800 towards paying off credit card debt, $100 toward her student loans, and use the remaining $100 to purchase a new grill for her deck. What's your friend's marginal propensity to consume (MPC)

Acompany manufactures x units of product a and y units of product b, on two machines, i and ii. it has been determined that the company will realize a profit of $3 on each unit of product a and $4 on each unit of product b. to manufacture a unit of product a requires 7 min on machine i and 5 min on machine ii. to manufacture a unit of product b requires 8 min on mchine i and 5 min on machine ii. there are 175 min available on machine i and 125 min available on machine ii in each work shift. how many units of a product should be produced in each shift to maximize the company's profit p?