Food Marketing Institute (FMI), a group representing the grocery retail industry, has asked President Obama to prevent FDA from implementing rules requiring grocery stores and other chains to the calorie content of all prepared foods. FMI says the rules shouldn’t apply to grocery stores because the diversity of products would create logistical challenges. The group also cited the cost of implementation, including signage and paperwork. Erik Lieberman, regulatory counsel for FMI, said the regulations would cost the grocery industry $1 billion in its first year.