Some of the nation’s biggest food suppliers and restaurants, including Kraft Heinz Co. KHC 0.48%▲ and some McDonald ’s MCD -1.97%▼ Corp. franchisees, said they would continue to raise prices as they face starkly higher costs . Kraft Heinz notified retailer customers this past Monday that it would raise prices in August on items ranging from Miracle Whip and Classico pasta sauce to Maxwell House coffee products and some deli meat.