Nordie's has four departments: retail, accounting, inventory, and sales. The company occupies 4,200 square feet of space in downtown Chicago with retail using 1900 sq. ft, accounting using 600 sq. ft., inventory using 1000 sq. ft, and sales using 700 sq. ft. The firm pays $21,420 per month to rent its office. How much monthly rent cost should Nordie's allocate to sales based off sq. ft? $3,570 $2,880 $5,355 $7,560