Problem 3-5A (Video) (Part Level Submission) Polk Company manufactures basketballs. Materials are added at the beginning of the production process and conversion costs are incurred uniformly. Production and cost data for the month of July 2020 are as follows. Production DataBasketballs Units Percent Complete Work in process units, July 1 470 60 % Units started into production 1,140 Work in process units, July 31 500 40 % Cost Data-Basketballs Work in process, July 1 Materials Conversion costs Direct materials Direct labor Manufacturing overhead $790 640 $1,430 2,108 358 1,360