The Monty Corporation has a staff of sales people who are paid a monthly salary of $1,400.00 plus an incremental commission based on the table below. If Sally sells $25,700.00, what is her total gross...

The Monty Corporation has a staff of sales people who are paid a monthly salary of $1,400.00 plus an incremental commission based on the table below. If Sally sells $25,700.00, what is her total gross pay for the month?