The production in board feet and the cost of manufacturing lumber at a sawmill are P(h)=300h and C(n)= 0.2n+9000 where P(h) is the number of board feet that can be produced in h hours and C(n) is the cost of producing n borafd feet. Find C of P of h and interpret its meaning.

This is what I have so far:

C(300h)= 0.2(300h) +9000

= 60h +9000

HELP!!!!!!!!