A retail store is planning to implement a wireless solution to enhance customer experience and operational efficiency. They have a floor area of 10,000 square feet and want to ensure that the wireless coverage is optimal throughout the space. The store layout includes various sections such as clothing, electronics, and a food court. The store manager wants to achieve a minimum signal strength of -67 dBm for mobile devices. Given that the average signal loss due to obstacles (walls, shelves, etc.) is estimated at 10 dB, and the access points (APs) have a maximum output power of 20 dBm, how many access points should the store deploy to ensure adequate coverage, assuming each AP can cover an area of 2,500 square feet under ideal conditions?