Mike has three containers of clay in his workshop. container a can hold 20 pounds, container b can hold 30 pounds, and container c can hold 40 pounds. container a is filled to 39% of its capacity. container b is full. container c has 4.1 pounds less than half its capacity. mike needs 35 pounds of clay for his next project, and he estimates that he has enough clay in the three containers. use estimation strategies to determine if mike's estimation is reasonable and to find the approximate total amount of clay he has in the containers.