Asalesperson is hired with a commission structure that allows for a 5% commission payment. this can be modeled by the function p(c) = 0.05c, where c is the sales amount on which commission is paid. the commission only applies for all sales above $7,500 in a single month. the function c(t) = t – 7,500, where t is the total sales for the month, can be used to model the situation.