Some of Bernie Sanders’ 1,831 New York delegates can’t scrape up enough cash to attend this month’s Democratic National Convention in Philadelphia — so they’ve turned to crowdfunding websites to raise the cash. “The cost definitely was a surprise,” said Jessica Frisco, 23, a delegate from the Upper West Side. “People are freaking out.” Unlike the savvy operators who usually win slots as convention delegates, some from Sanders’ campaign say they had no idea they would have to spend up to $5,000 on travel expenses.