By , (Reuters) - Walmart Inc expects full-year sales and profit growth to slow as it reinvests in its business, after revenue soared to $560 billion last year as people stocked up on groceries during the pandemic.The world’s biggest retailer, which employs 1.5 million people in the United States, also said it is raising wages to more than $15 per hour on average. About half of Walmart’s hourly U.S. workers will earn $15 an hour or more, though there are some roles that will still start at $11 an hour, the company said.Shares in Bentonville, Arkansas-based Walmart closed down 6.5% on...…By , (Reuters) - Walmart Inc expects full-year sales and profit growth to slow as it reinvests in its business, after revenue soared to $560 billion last year as people stocked up on groceries during the pandemic.The world’s biggest retailer, which employs 1.5 million people in the United States, also said it is raising wages to more than $15 per hour on average. About half of Walmart’s hourly U.S. workers will earn $15 an hour or more, though there are some roles that will still start at $11 an hour, the company said.Shares in Bentonville, Arkansas-based Walmart closed down 6.5% on...WW…