Necco, the US confectionery firm, has been acquired by Sweetheart Candies Co owner Metropoulos & Co for $17.3 million, after the cancellation of a proposed deal with Spangler Candy. Spangler Candy made the winning bid for Necco in a bankruptcy auction, but the deal is said to have collapsed when the former pushed for a change in the $18.3 million purchase price, according to a Fortune report. Commenting on the …