the following selling price and cost information is associated with the online retailer Tea Company's hottest selling mug, The Warmer. Selling price per unit $18, Product cost per unit $7, Marketing costs per month $100, Administrative costs per month $200, Other fixed costs per months $200, Shipping costs per unit (currently paid by Tea Company) $3, Sales volume of mugs per month. How much monthly operating income does the Tea Company currently earn?