part exchange

13 LETTERS · STARTS WITH P

part exchange is a valid 13-letter word worth 27 points in Scrabble and 30 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

P3A1R1T1E1X8C3H4A1N1G2E1

3 + 1 + 1 + 1 + 0 + 1 + 8 + 3 + 4 + 1 + 1 + 2 + 1 =27 PTS

DOUBLE WORD → 54TRIPLE WORD → 81

MEANING

What does part exchange mean?