Answer:
A. Buy the telephones; the savings is $12,000
Explanation:
The computation is shown below;
Particulars Without offer with offer
Direct material $4,000 $0
(2,000 × $2)
Direct labor $16,000 $0
(2,000 × $8)
Variable manufacturing overhead $12,000 $0
(2,000 × $6)
Fixed manufacturing overhead $12,000 $2,000
($12,000 - $10,000)
Purchase cost $30,000
($2,000 × $15)
Total cost $44,000 $32,000
Therefore the option A is correct