The controller of Carla Vista Production has collected the following monthly expense data for analyzing the cost behavior of electricity costs. Total Electricity Costs Total Machine Hours
January $2,650 200
February 3,100 320
March 3,570 450
April 4,750 695
May 3,160 500
June 4,910 750
July 4,130 630
August 3,810 580
September 5,060 680
October 4,390 610
November 3,290 320
December 8,920 770
(a) Determine the fixed and variable cost components using the high-low method.
(b) What electricity cost does the cost equation estimate for a level of activity of 450 machine hours?
(c) What electricity cost does the cost equation estimate for a level of activity of 750 machine hours?

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?