Suppose the labor cost(in dollars) for manufacturing a camera can be approximated by

L(x,y)=3/2 x²+y²7x2y2xy+107

where x is the number of hours required by a skilled craftsperson and y is the number of hours required by a semiskilled person. Find values of x and y that minimize the labor cost. Find the minimum labor cost.

Labor cost will be minimized when x=? and y=?

The minimum labor cost is $?

(Round to the nearest cent)