What is a level of production in which the marginal production decreases with new investment?

What is "staffing level"? a) the practice of assigning the same number of workers to each department b) the average educational level attained by employees of a business c) the rank above cashier d) the number of workers assigned to jobs at a particular time

Susan is a 5th grade teacher and loves getting up every day and going to work to teach her students. this is an example of a. extrinsic value b. interests c. intrinsic value d. external value

An allergy products superstore buys 6000 of their most popular model of air filters each year. the price of the air filters is $18. the cost of ordering and receiving shipments is $12 per order. accounting estimates annual carrying costs are 20% of the price. the supplier lead time is 2 days. the store operates 240 days per year. each order is received from the supplier in a single delivery. there are no quantity discounts. what is the store’s minimum total annual cost of placing orders & carrying inventory?