Xia Co. currently buys a component part for $10 per unit. Xia believes that making the part would require $7.25 per unit of direct materials and $1.20 per unit of direct labor. Xia allocates overhead using a predetermined overhead rate of 235% of direct labor cost. Xia estimates an incremental overhead rate of $0.55 per unit to make the part. 1-a. What are the relevant costs for Xia to make or buy the part

Haley photocopying purchases a paper from an out-of-state vendor. average weekly demand for paper is 150 cartons per week for which haley pays $15 per carton. in bound shipments from the vendor average 1000 cartoons with an average lead time of 3 weeks. haley operates 52 weeks per year; it carries a 4-week supply of inventory as safety stock and no anticipation inventory. the vendor has recently announced that they will be building a faculty near haley photocopying that will reduce lead time to one week. further, they will be able to reduce shipments to 200 cartons. haley believes that they will be able to reduce safety stock to a 1-week supply. what impact will these changes make to haley’s average inventory level and its average aggregated inventory value?