If a thousand dollars is spent on equipment and y thousand dollars is spent on labor a factory produces Q(x,y) 50,1/3,1/2 units of output. If $80,000 is allocated between labor and equipment, the change in maximum output (in 1.000's of dollars) if the allocation is increased by 2,000$ is Select one: a. 50 b. 50000 O c25 O d. 25000