The price-cutting atmosphere that has plagued the laundry category for three quarters is coming to an end. Procter & Gamble Co. will raise detergent prices by 4.5% in June as the world’s largest household products maker starts to respond to rising costs for materials, packaging and transportation. The maker of Tide, Gain and Era laundry detergents said the increase would go into effect on June 6. P&G and other consumer products makers are dealing with higher costs for ...