4

A bookseller sells books printed by popular poets across the world. It sells in a lot of
20 books per set to retail shops. Expected Sales and its associated costs for the
upcoming year are given below
Month	# of Set	Total
	sold	Cost
Jan	230	$ 10,000
Feb	550	$ 26,500
Mar	560	$ 27,000
Apr	650	$ 31,500
May	400	$ 21,000
June	560	$ 26,250
July	680	$ 32,000
Aug	700	$ 32,500
Sep	500	$ 24,000
Oct	600	$ 26,750
Nov	600	$ 28,000
Dec	500	$ 24,500
Solve by Least-squares Regression Method ONLY AND COMPUTE THE FOLLOWING
Requirements:
(i) Variable cost per Set= $
(ii) Fixed cost per month = $
(iii) Semi Variable costs per month = $
(iv) Semi Fixed costs per month = $
REMEMBER NOT TO SOLVE BY HIGH-LOW METHOD
Need 100% Correct Answer only