Bonita Industries produces flash drives for computers, which it sells for $30 each. Each flash drive costs $6 of variable costs to make. During April, 1000 drives were sold. Fixed costs for April were $6000. How much does Bonita’s operating income increase for each $2400 increase in revenue per month?

An increase in the market price of men's haircuts, from $16 per haircut to $26 per haircut, initially causes a local barbershop to have its employees work overtime to increase the number of daily haircuts provided from 20 to 25. when the $26 market price remains unchanged for several weeks and all other things remain equal as well, the barbershop hires additional employees and provides 40 haircuts per day. what is the short-run price elasticity of supply? nothing (your answer should have two decimal places.) what is the long-run price elasticity of supply? nothing (your answer should have two decimal places.)