The local jewelry store is running a special on gold bracelets for the month of February. Each of these bracelets sells for $82, but the jewelry store's cost for the bracelet is just $30. The salesperson earns a $4 commission on each bracelet sold. Fixed costs at the store run $2,304 per month. The store's sales volume is currently 60 bracelets each month. (a) What is the store's margin of safety per month, in units? Margin of safety in units units