The expected return on a stock is called the from the investor's perspective, and the from the company's perspective. excess return; cost of capital required return; cost of capital excess return; cost of equity required return; cost of equity

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?