The A-1 Corporation supplies airplane manufacturers with preformed sheet metal panels that are used on the exterior of aircraft. Manufacturing these panels requires only five sheet meta forming machines, which cost $500each, and workers. These workers can be hired on an as- needed basis in the labor market at $9,000 each. Given the simplicity of the manufacturing process, the preformed sheet metal panel market is highly competitive. Therefore, the marke price for one of A-1's panels is $80. Based on the production data in the accompanying table, how many workers should A-1 hire to maximize its profits? Metal-forming Machines Workers # of Panels Produced 0 0 1 600 2 1000 3 1290 4 1480 un 1600 6 1680