help me solve for the total earnings, step by step for each equation

Short Answer: (8@2 point each =16 points ) 1. Joe White is paid a salary of $410 a week and a commission of 5.6% on all sales. His sales last month were $6,700. Find his total earnings for a 4 -week period, neangione 2. Rosie Gilbert receives a weekly salary of $600 plus 1/2% commission on all sales in excess of $12,500 a week. Last week her sales were $48,370. What were her total weekly earnings? 3. Noel Pavel is paid a commission on all sales over $3,000 a week. Last week she carned a commission of $420 on sales of $16,000. What rate of commission was she paid to the nearest tenth percent