Walmart said Thursday it plans to increase prices this month as tariffed goods start to hit shelves — warning that the size and speed of the price hikes could be “unprecedented”. The Arkansas-based retail giant has already started raising markups on certain items as suppliers pass along the additional costs. Bananas, for example, jumped to 54 cents a pound, up from 50 cents, according to Walmart Chief Financial Officer John David Rainey. “The magnitude and speed at which these prices are...