Assignments are made to locations with 0 in the opportunity cost table

A retailer has begun to pre-wrap gift items and to re-deploy checkout personnel to reduce waiting times. The retailer is responding to which demographic and lifestyle factor?

a. gender roles b. poverty of time c. component lifestyles d. consumer sophistication and confidence

The expected number of customers in the waiting line is:

A) .6. B) .7. C) .8. D) .9.