I'm struggling with this question: the answer is given in this example however I am unsure how to get that answer.

How to find the wages expense for sales staff? I have the answer but I'm unsure of the calculation from the information given.

Wages expense - Sales staff= $3819

Information given:

• Sales Staff are paid fortnightly and work 7 days per week. The sales staff were last paid on the 29 June, 2020. One day of the wages bill is still owed to the Sales Staff.
• Wages Expense - Sales Staff = 829,818