time record (total time: 42 minutes = 0.7 hours)(1:17-1:59, 42 minutes) updated class structures and automated test structures and automated test implementations: AbstractProduct class; added class implementations: AbstractProduct class, SellProduct class, SwapProduct class
time record (total time: 42 minutes = 0.7 hours) (1:17-1:59, 42 minutes) updated class structures and automated test structures and automated test implementations: AbstractProduct class; added class implementations: AbstractProduct class, SellProduct class, SwapProduct class