A producer’s supply function is given by the equation: where Qs s is the quantity of steel supplied by the market, Ps is the per-unit price of steel, and Pa is the per-unit price of aluminum. If the...

A producer’s supply function is given by the equation:

where Qs s is the quantity of steel supplied by the market, Ps is the per-unit price of steel, and Pa is the per-unit price of aluminum.

If the unit price of aluminum is 10, the slope of the supply curve is closest to:

A. 0.04.

B. 1.30.

C. 26.00.