Percent Yield to determine grams?

Reaction 1 should produce 278.8 g ZnO, but since its yield is only 76.2%, it produces only 212.4g of ZnO. Using that number to start reaction 2 should produce 421.1 g of ZnSO4, but since it is only 84.3% it produces only 355.0 g of ZnSO4. Using that number to start reaction 3 produces 143.9 g of Zn.