eateries soldwill begin sometime after that, said Mike Malanga, Restaurant Enterprises vice president of corporate development. He declined to say how much the company will spend converting the restaurants.The use of the figures belongs to a Michigan company that is the franchiser for Bob's Big Boy restaurants.For Restaurant Enterprises, the deal will boost the company’s sales by at least 13 percent and expand its number of restaurants by 23 percent. The Irvine-based company is the nation’s 13th-largest food-service company, with 1990 sales ofS900 million from 514 restaurants, according to Nation’s Restaurant News, a trade magazine.The typical Bob’s Big Boy posted annual sales of about $1.1 million. Restaurant Enterprises is converting the restaurants to Carrows and Coco’s because they “enjoy a strong position” in Southern California’s crowded dining industry, President Norman Habermann said in a statement.Many of the Bob's Big Boy outlets are near Coco’s and Carrows restaurants, which could cannibalize sales at those locations, said Please see BIG BOY/2