Retail service shop or custom shop, such as bakery, candy, ice cream or similar shop; custom tailoring or millinery shop; clock, watch or jewelry shop; radio, television or household appliance repair shop, provided that:
(1)
Any processing activity, if located on the ground floor, shall be not less than 15 feet from the front of the building and shall be screened by a wall or partition from the front portion of the building used by customers.
(2)
Any article made shall be sold at retail from the premises.
(3)
The area devoted to processing shall constitute not more than 40% of the gross floor area.