The Production Possibilities Frontier is an economic model used by economists to A. Illustrate how a business can use limited resources to produce two different products

B. Illustrate the potential productive capabilities of the free market system

C. Determine the costs and benefits of a unionized labor force

D. Analyze the effectiveness of trade policies

Asupermarket has been experiencing long lines during peak periods of the day. the problem is noticeably worse on certain days of the week, and the peak periods are sometimes different according to the day of the week. there are usually enough workers on the job to open all cash registers. the problem is knowing when to call some of the workers stocking shelves up to the front to work the checkout counters. how might decision models the supermarket? what data would be needed to develop these models?