Chen's normal weekly pay is approximately $542.
Chen receives 17.5% of 4 weeks normal pay as leave loading, which is $379.40.
Let's denote Chen's normal weekly pay as X. The leave loading is calculated as 0.175 * 4 * X = 0.7X.
So, the equation is:
0.7X = $379.40
Now, we can solve for X:
X = $379.40 / 0.7
X is approximately $542.
Therefore, Chen's normal weekly pay is approximately $542.