4. The company presently has an inventory of XYZ material of 670 units after two days that a delivery of 800 units was made by a supplier. The company uses the material at almost the same quantity everyday. It takes two weeks for the supplier to deliver an order. The company uses the base stock method in managing its raw materials inventory and has a base stock of 65 units for this material. It operates for seven days a week. What is the base stock for this material? a. 975 units b. 735 units c. 910 units d. 865 units