6 he prot in dollars from the sale of x expensive watches is Ply} = 0.02):2 2x + 5x\"r Find the marginal prot when {a} = 300m = 100 1: 60mm\" = 12,000] [a] When 3: = 300, the marginal prot is $|:|_ {Round tn the nearest integer as needed] -_"""""'---.._.___._.--'-"""