 Development began that year, and while the company found that the new product lines would add an approximate eight second delay to the production time of orders and would cost about $39 million in lost productivity, the product was introduced in 1979.Despite these possible sales losses and time issues, the new products were successful and the company's sales increased by 15 percent.This line — with many non-hamburger sandwiches, including chicken and fish — significantly expanded the breadth of the Burger King menu.