saving time by changing $'000 to $m

The single company and consol question will probably be presented in $’000. To save time would it be OK if I present my solution in $m rather than $’000? This would mean writing say 2.6 rather than 2,600. In the case of say 4,000 I would save even more time because I would only have to write 4.

I timed myself. It took me 15 seconds to write 000 10 times. If I have to write 000 100 times in the exam that’s 150 seconds = 2.5 minutes saved. I would surely gain a mark in those 2.5 minutes.