When you mechanically attain for a $39.99 sweater or load up on $9.99 albums on iTunes, you’re not alone. The technique of ending costs with 99 cents has labored its magic on all of us. The psychology of procuring impacts just about all the pieces you purchase. Retailers use quite a lot of methods to get us to spend extra — from labeling costs with out greenback indicators to setting a per-buyer restrict.