A company plans to sell 24,000 units of product R next year. Opening inventory of R is expected to be 2,000 units and the company plans to increase inventory by 25% by the end of the year. How many units of product R should be produced next year?
选项：

A: 23,500 units ;
B:24,000 units ;
C:24,500 units;
D:30,000 units