Training
$25

Usage
$10/hour (round up to the next 15 min. interval)
1 min. to 15 min. is  $2.50
16 min. to 30 min. is $5
31 min. to 45 min. is $7.50
46 min. to 60 min. is $10

Consumables
$0.30 per pound of garnet (fine cutting sand)