Commercial shopping center which includes supermarket or three (3) or more individual uses (tenants, one (1) of which is a supermarket of twenty-five thousand (25,000) square feet or more): six and five-tenths (6 5/10) spaces for each one thousand (1,000) square feet of gross floor area; commercial shopping centers of two hundred fifty thousand (250,000) square feet or more of gross floor area: six (6) spaces for each one thousand (1,000) square feet.