Answer:
[tex]\$316.80\:\text{a week}[/tex]
Step-by-step explanation:
If a 40% income tax is deducted from Mrs. Frank's income, her total/net income will be 60% of her income before income tax.
Therefore, her net pay is equal to [tex]528\cdot 0.6=\boxed{\$316.80\text{ a week}}[/tex].