How must should be produced?

A manufacturer has a steady annual demand for 15,624 cases of sugar. It costs $7 to store 1 case for 1 year, $31 in setup cost to produce each batch, and $17 to produce each case. (a) Find the number of cases per batch that should be produced to minimize cost. (b) Find the number of batches of sugar that should be manufactured annually. . . . (a) The manufacturer should produce cases per batch. (b) The manufacturer should produce batches of sugar annually