Answer:
case 1: when $405,000 fixed overhead cost can be avoided
make	buy	net income
direct material
994700	0	994700
direct labor	832300	0	832300
variable overhead	101500	0	101500
fixed overhead	600000	195000	405000
purchase price	0	2314200	(2314200)
total	2528500	2509200	19300
YES,jobs should accept the offer because it results in saving of $19300
CASE 2: when no fixed overhead can be avoided
make	buy	net income
direct material	994700	0	994700
direct labour	832300	0	832300
variable overhead	101500	0	101500
fixed overhead	600000	600000	0
opportunity cost	375000	0	375000
purchase price	0	2314200	(2314200)
total cost	2903500	2914200	(10700)
NO, jobs shold not accept the offer because it results in loss of $10700