A delivery person makes deliveries to two project sites, site A and site B. He receives

$1000 per delivery to site A and $200 per delivery to site B. He is required to make at least five deliveries per week to site B. Each delivery to either site A or site B takes him 3 h to complete. There is an upper limit of 35 h of delivery time per week. The objective of the delivery person is to increase his delivery income as much as possible. Formulate his problem as an LP model.