John has to replace the ball bearings for machines he works with

John has to replace the ball bearings for machines he works with. He has 10 machines and they take 30 ball bearings each. It normally costs $1 per ball bearing but right now there is a sale where they are only $.75. Also since he is buying in bulk he gets a further 20% discount. How much money did he save by buying them all during the sale rather than 1 at a time?

GSM8K — Grade School Math 8K (Cobbe et al., OpenAI, 2021) · train #3853