Which shows a correct order to solve this story problem?

gina used 3.2 ounces of strawberry jelly and 4.7 ounces of raspberry jelly in her recipe. she made the same recipe 4 times.

how much jelly did gina use altogether?

a.
step 1: add the weights of the two jellies.
step 2: divide that sum by 4.

b.
step 1: subtract the weight of the strawberry jelly from the raspberry jelly.
step 2: multiply that difference by 4.

c.
step 1: add the weights of the two jellies.
step 2: multiply that sum by 4.

d.
step 1: subtract the weight of the strawberry jelly from the raspberry jelly.
step 2: divide that difference by 4.