My grocery store does both. If the label says "Sale: 2/$5, Was: $3.99" and I buy one, I get charged $2.50. If the label says "2/$5, Single item: $3" and I

My grocery store does both. If the label says "Sale: 2/$5, Was: $3.99" and I buy one, I get charged $2.50. If the label says "2/$5, Single item: $3" and I buy one, I get charged $3.