Swifty Frosted Flakes Company offers its customers a pottery cereal bowl if they send in 3 boxtops from Swifty Frosted Flakes boxes and $2. The company estimates that 60% of the boxtops will be redeemed. In 2021, the company sold 1355000 boxes of Frosted Flakes and customers redeemed 660000 boxtops receiving 220000 bowls. If the bowls cost Swifty Company $4 each, how much liability for outstanding premiums should be recorded at the end of 2021?