Cullumber Limited purchased four articulated robots on account on May 1,2024, at an invoice price of $550,000. On May 2, it paid $4,000 for delivery of the robots. A one-year, $5,500 insurance policy on the robots was purchased on May 3. On May 30, Cullumber paid $10,000 for assembly, installation and testing of each robot on a production line. The robots started operating or were ready for use on July 1. Cullumber estimates the useful life of the robots will be four years or 10,100 units with a residual value of $100,000. Assume the robots collectively produce the following numbers of units each year: 1,500 units in 2024; 2,800 units in 2025; 2,600 units in 2026 ; 2,200 units in 2027; and 1,000 units in 2028. Cullumber has a December 31 year end. (a) Determine the total cost of the robots. Cost of the robots $