ABC Hotel is a 390-room economy hotel in downtown St. Louis. After taking physical inventory of the laundry chemicals on May 31st, the assistant controller found that: In the Main Storeroom 15 cases of detergent at $90 each 15 cases of neutralizer at $65 each 16 cases of softener at $31 each 7 pails of bleach at $7.50 each 1 bucket of starch at $13.50 each In the Laundry Room 5.75 cases of detergent 2.25 cases of neutralizer 8.50 cases of softener 0.50 pails of bleach 0.25 buckets of starch The beginning inventory for laundry supplies on May 1st was $6,051.75. Purchase of laundry chemicals on May 9th totaled $890.15. The hotel sold 9,067 rooms for the month at an average daily rate of $65.10. Please calculate the laundry chemical cost percentage for the month.