A pharmaceutical company wants to test the efficiency of its new drug production techniques so they run 3 shifts of production for 4 hours each and collect the product at the end of each shift. Their chemical engineers predict a maximum of 7000 grams of product can be created each shift. Shift one produces 4562 grams.
Shift two produces 5783 grams.
Shift three produces 5247 grams.

What is the average percent yield for this new production technique?
A. 74.25%
B. 82.61%
C. 74.95%
D. 51.97%