The answer would be 38.722222 (the two just keeps repeating)
There are 4 hundredths or 4/100
Add all the numbers for 13, 14 , 15 and 16 which is 6+4 +0 +2 = 12
so 12 shirts
and one sock with pink toes
F(g(x)) means you take the g function and put it into x in the f function. He took the function and put it into the g, which was the incorrect order. He should have had this: