Similar to a shopper filling their cart with gifts in advance of the approaching holidays, NJ Transit did some December shopping as well — announcing Wednesday its recent purchases of 60 new buses and a ferry, as well as the rebuilding of 35 locomotives. NJ Transit’s board of directors did the agency’s equivalent of signing the credit card receipt on Wednesday morning, approving $7 million to build a ferry for service from Carteret, $56 million for 60 articulated buses and $34 million to overhaul its oldest dual mode electric-diesel powered locomotives. The board doesn’t meet again until Febru…