An application letter for a position as assistant product manager {1501 Deer Park Lane Anderson, TX 77830 May 23, 2013} The part is the address of ____ of the letter. A.sender B.receiver. {Ms. Rachel M. Robinson Manager, Human Resources Del Rio Enterprise Houston, TX 75835}The part is the address of ____ of the letter.A.sender B.receiver. Dear Ms. Robinson: Your advertisement for an assistant product manager, appearing May 22 in Section C of Houston Chronicle, immediately caught my attention because my education and training closely parallel your needs.