A store can increase its profit by increasing the price of the sweaters that it sells. The relation between the income, R, in dollars, and the dollar increase in the price per sweater, d, can be modelled by the equation R--50(d - 3.5)* + 4500. What is the maximum possible income? a. S4500.00 b. S3887.50 c. $50.00 d. $3.50