So , a picnic in central park on Saturday ?

-On Saturday , if the weather is good .. which it has been .. I want to go on a picnic w. my boyfriend in Central Park .. I'm currently staying at the New York Presbyterian - Weill Cornell Medical Center on 68th St . in Manhattan , so I'm fairly close ( my brother is here ) . It'll probably be mid - day , more evening .. around 7 .. Where's a good place to get picnic type foods , that's fairly cheap because I'll have to buy a blanket , a picnic basket & some other things , the budget is 100 dollars if not less , & we're not going to site see or anything .. just picnic & enjoy time together .. any suggestions ? please !