NEWARK, Del.--(BUSINESS WIRE)--The Bank of Mom and Dad is open for business as parent out-of-pocket spending became the No. 1 source of college funding, according to “How America Pays for College 2015,” the national study from Sallie Mae, the nation’s saving, planning, and paying for college company, and Ipsos, a global independent market research company. This year’s report—now in its eighth year—found parent income and savings covered the largest share of college costs, 32 percent, surpassing