By Theopolis Waters CHICAGO (Reuters) – The cost to produce a BLT, America’s favorite summer sandwich, hit a record high of $1.65 in May and will continue to take a bigger bite out of wallets in the coming months, given a pig virus that has ramped up bacon prices and drought-stricken salad crops in California. PEDv deaths helped push bacon to a record $6.05 per pound in May when the price to make bacon, lettuce and tomato (BLT) sandwiches also peaked.