On Monday, a person mailed 8 packages weighing an average (arithmetic mean) of $$12\frac{3}{8}$$ pounds, and on Tuesday, 4 packages weighing an average of $$15\frac{1}{4}$$ pounds. What was the average weight, in pounds, of all the packages the person mailed on both days
-
A$${13}\frac{1}{3}$$
-
B$${13}\frac{13}{16}$$
-
C$${15}\frac{1}{2}$$
-
D$${15}\frac{15}{16}$$
-
E$${16}\frac{1}{2}$$