Diamond Line is a distributor of everything a florist needs to create a beautiful arrangement except the flowers. It sells to 10,000 flower and gift shops and 3,000 supermarkets nationwide. Each florist is called on four times a month, and each supermarket is called on twice a month. A sales call to a florist takes one hour, and a sales call to a supermarket takes two hours of selling time. An average salesperson spends 1,000 hours per year making sales calls. Calculate the number of salespeople Diamond Line needs to cover its account base for a year.