How to update Column C with EXP and REV word
1. if Column A first two digits are 15 then Column B # then replace Column C with "REV".
2. if Column A first two digits are 17 then Column B # then replace Column C with "EXP".
| Column A | Column B | Column |
| 154589 | # | n/a |
| 17456 | # | n/a |
| 154589 | # | n/a |