Unit costs of the weighted-average and FIFO methods will differ significantly when Question 9Select one: a. conversion costs per unit vary greatly and physical inventory levels of work-in-process are small relative to the number of units transferred out. b. direct materials or conversion cost per unit vary greatly and physical inventory levels of work-in-process are large relative to the number of units transferred out. c. physical inventory levels of work-in-process are small in relation to the number of units transferred out. d. direct materials or conversion costs per unit vary little from period to period. e. direct materials or conversion costs per unit are similar and physical inventory of work-in-process are small relative to the number of units transferred in