A construction manager just starting in private practice needs a van to carry crew and equipment. She can lease a used van for dollar 3856 per year, paid at the beginning of each year, in which case maintenance is provided. Alternatively, she can buy a used van for dollar 5537 and pay for maintenance herself. She expects to keep the van for three years at which time she could sell it for dollar 1122. What is the most she should pay for uniform annual maintenance to make it worthwhile to buy the van instead of leasing it, if her MARR is 20%? Enter your answer as follow: 123456