Solve the Problem $C(x, y)=4 x^{2}+2 y^{2}-400 x-300 y+26,000$ , Where $x$

Multiple Choice

Solve the problem.
-Suppose that the labor cost for a building is approximated by
$C(x, y) =4 x^{2}+2 y^{2}-400 x-300 y+26,000$ , where $x$ is the number of days of skilled labor and $y$ is the number of days of semiskilled labor required. Find the minimum labor cost.

A) $\$ 7250$
B) $\$ 44,750$
C) $\$ 49,750$
D) $\$ 4750$