Answer: Rework the phones
Step-by-step explanation:
The phones have already been produced so the cost price of $70 does not matter as it is a sunk cost.
The decision the company makes between scrap and reworking will depend on which option bring in more money.
Scrap = $39
Reworking:
= Price after reworking - Cost to rework
= 146 - 82
= $64
Incremental income of reworking over scrap:
= 1,075 * (64 - 39)
= $26,875
Signal makes an incremental income of $26,875 if they rework the phones so they should do that.