Katherine, a sales representative at a jewelry store, receives a 1.50% commission for the first $15,000 in sales he makes, 4.00% for the next $20,000, and 5.50% thereafter. If he was paid $2,000.00 in commissions last month, calculate the amount of sales he made. Banner House Inc. gives all its sales people a base salary of $40,500 per annum and a commission of 15% on all banners that they sell over $5,000. Calculate Jonathan's salary last month if he sold $11,000 worth of banners