What should I do with these 2 jobs?

okay so about a month ago I signed up for this telephone fundraising position, little did I know I was entering a temp agency... so i interviewed for it about 3 weeks ago, I guess they have different events all the time and are constantly looking for people. So the first time I interviewed, I mentioned to my recruiter I had another job opportunity but was still interested in the position.. later he told me the position was filled. SO today I applied for a grocery store on CL and they emailed me right back asking for an interview, it's right up my alley, its an organic grocery store.. anyways, so my recruiter also called me and said that the telephone fundraising company decided they wanted to hire me for this event and training is on monday at 10 am, which is also the DAY the grocery store asked me to interview... I asked my recruiter why they didn't want to hire me last time but now they wanted to, he said that my personality wasn't suited for that position but now it is because my tone and attitude would be better suited talking to high networked CEOs and people like that. I was like okay.. so I have a dilemma. What should I do? the grocery store didn't tell me what time to come in.. and the telephone fundraising according to my recruiter could last at least a month... but if I'm good they would probably hire me part time.. something like that..