Products A, B, and are sold door to door. Product A costs $3 per unit, takes 10 minutes to sell (on the average), and costs $0.50 to deliver to the customer. Product B costs $5, takes 15 minutes to sell, and is left with the customer at the time of sale. Product C costs $4, takes 12 minutes to sell, and costs $1.00 to deliver. During any week a salesperson is allowed to draw up to $500 worth of A, B, and C (at cost) and is allowed delivery expenses not to exceed $75. If a salesperson's Selling time is not expected to exceed 30 hours (1800 minutes) in a week, and if the salesperson's profit (net after all expenses) is $1 each on a unit of A or B and $2 on a unit of C, what combination of sales of A, B, and C will lead to maximum profit and what is this maximum profit?​