Tj earns a 20% commission on all sales plus a base salary of $40,000. his total income last year was more than $70,000. which inequality can be used to calculate the minimum number of tj's sales? 40,000 - 0.2 > 70,000 0.2 + 40,000x > 70,000 70,000 + 0.2x > 40,000 40,000 - 0.2x > 70,000