单选题

Afterlookingintothebakery&rsquosfinancials...

Question

After looking into the bakery’s financials, you decide to further investigate the cake segment of the business. The owner tells you that during October and November one of his bakers spends 50% of his time baking cakes, but that he employs two temporary extra junior bakers in December to help produce the necessary number of cakes during the Christmas season. In December, 2.5 full time bakers therefore focus on baking cakes. The owner provides you with Table 2, which summarises the number of items produced by the bakery between October and December. He also gives you Exhibit 1, which illustrates the number of cakes the bakery can produce depending on the number of bakers it employs. Finally, he tells you that a full time baker works 160 hours per month. 

What is the approximate difference in the bakers’ productivity, measured in minutes to bake a cake, in December versus the average of the previous two months?

A. 1 minute

B. 5 minutes

C. 9 minutes

D. 13 minutes