Study the given table and answer the question that follows.
The table shows the number of donuts sold by three different stores in five different months.

What is the ratio of the total number of donuts sold by stores P and R together in October to the total number of donuts sold by stores Q and R together in the same month?

A

353 : 217

B

217 : 373

C

373 : 217

D

217 : 353