Determine the equation in the word problem; "A company that manufactures inline skates needs to order three parts-part A, part B, and part C. For one shipping order the company needs to buy a total of 2000 parts. There are two times as many B parts as C parts. The total number of A parts is one-third the sum of the B and C parts. On previous orders, the costs had been $0.50 for part A, $0.75 for part B, and $1.00 for part C, resulting in a cost of $1500 for all the parts in one order. When filling out an order for new parts, the company sees that it now costs $0.80 for part A, $0.40 for part B, and $0.60 for part C. Will the company be able to buy the same quantity of parts at the same price as before with the new prices. (Systems of Equations)