A machine shop manufactures custom brake disks for high performance cars. The shop needs to meet a demand of 1400 units per year. For each production run there is a setup cost of 1300 dollars, and there is a cost of 110 dollars per unit for materials and supplies. Storage of unsold units costs the shop 13 dollars per year. How many units should the shop produce on each production run in order to minimize inventory costs (setup plus storage)? Round your answer to the nearest integer.