Thanks for clarifying, with the recent USPS shipping rate changes we are actively researching the pricing with our shipping label provider. Currently our First class package costs are based on the rate we are charged by our shipping label provider. We currently have a cost savings over retail at the 4+ oz. where retail is $2.74 - $3.54, versus our cost of $2.68.
We do see where the USPS retail rates for 1-3 oz. first class packages are even lower than the USPS posted commercial rates for the same size package, so we are investigating with our shipping label provider to determine why, and if there is something that can be done to receive the more favorable pricing for 1-3 oz. first class packages.