Anna scout troop went on an overnight camping trip. there were 4 scouts in thr troop who had never camped before for every 3 scouts who had camped. if there were 9 scouts in the troop who had camped before, how many scouts had never camped

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?