Answer :
You add the Kalil's monthly salary (3,250) to his sales (51,000), then multiply 1.4% ( as a percent: 0.014)
The equation for this problem is
3,250 + 51,000 (0.014)
54,250 (0.014)
3,964
The equation for this problem is
3,250 + 51,000 (0.014)
54,250 (0.014)
3,964