As restaurants continue to reopen across the country, diners may be in for a bit of sticker shock.A new report states that food costs themselves are up significantly.And a drastic increase in the price of meat is a key driver.Research found that standard beef cuts are up 87%, and fresh ground-beef patties are up 81%.But it's not just beef; prices of pork cuts are up 70%.When dining establishments closed, meat producers had to try to quickly pivot to retail sales.Now, restaurants may be paying the price to have those items sent back their way.Meanwhile, the federal government wants to check that these major fluctuations are on the up and up.The USDA and the Department of Justice are investigating whether collusion in the industry is driving these price spikes