Forty years ago, it was typical for grocery stores to post prices by labeling each individual can or box. When prices changed, an employee would have to relabel every item in the store so that the cashier could bring them up correctly. Today, most prices are posted on shelf labels and scanned into cash registers using bar codes.
a. How has this change to pricing items in stores affected menu costs?
b. Are menu costs the same for all grocery store items? Briefly explain.