Fill in the blankwith the correct wordsto complete the sentence the least common multiples is the blank multiple, other the zero common to sets of multiples

The salesperson earns a 5% commission on the first $5,000 she has in sales. the salesperson earns a 7.5% commission on the amount of her sales that are greater than $5,000. this month the sales person had $8,000 in sales. what amount of commission, in dollars, did she earn?