What part of the salaries and/or commissions for derek and lawanna should be assigned to administrative costs? $6,000 for derek and $1,500 for lawanna (commissions only). $0 from derek's salary and $10,000 from lawanna's salary (part of salary and no commissions). $31,000 for derek and $31,500 for lawanna (all salary and all commissions). $25,000 for derek and $30,000 for lawanna (all salary and no commissions).

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?