Assume a retail tenant is paying a base rent of $120,000 per year (or $10,000 per month). In addition, the tenant must pay 7 percent of gross store sales in excess of $143,000 per month as percentage rent. The store produces $170,000 in gross sales in a month. Calculate: a. the percentage rent in that month (6 pt.) b. the total rent due for the month (4 pt.)