CAM charges for retail leases in a shopping mall must be calculated. The retail mall consists of a total area of $2\mathrm{.}8$ million square feet, of which $820,000$ square feet have been leased to anchor tenants that have agreed to pay $$4$ per rentable square foot in CAM charges. In$-$line tenants occupy $1\mathrm{.}3$ million square feet, and the remainder is common area, which the landlord believes will require $$10$ per square foot to maintain and operate each year.

Required:

If the owner is to cover total CAM charges, how much will in$-$line tenants have to pay per square foot for CAM charges?