Dean Foods, a US-based producer of dairy and other food products, has announced that it has agreed to acquire the manufacturing and retail ice cream business Friendly’s Ice Cream for $155 million in cash. Founded in 1935, Friendly’s Ice Cream produces packaged ice cream and other frozen dessert products, including single-serve sundae cups, novelty items, cakes and rolls, distributing them in over 8,000 retail outlets. The firm’s net sales in 2015 were …