Honestly, you will probably regret taking that position. The position is probably available to you because of high turnover in the company. Rite Aid managers get abused. I saw it while I was with the company as a photo tech. You are going to be doing all the work because the company will not give you payroll to have any associates on the clock. When I was there, the managers worked at least 50 hours a week.
The company is also in terrible shape. Their stocks are trading at about 25 cents per share. They were also listed in a report of companies that may not survive 2009.
A few weeks ago on CNN, they listed a few retailers that were hiring and CVS was one of them. You would probably be way better off pursuing a job there. Much better company in much better financial shape that will weather the storm of the recession. You'd also probably get more reasonable hours and better pay there.