#### Answer

121.2 g

#### Work Step by Step

Total mass= 10.25 g + 5.5654 g + 105.4 g
Recall: The result cannot have more digits to the right of the decimal point than either of the original numbers.
Here, 105.4 has only one digit after the decimal point and the result should be reported only up to one digit after the decimal point, which is 121.2 g