Current Attempt in Progress

The credit terms offered to a customer by a business firm are $\frac{4\mathrm{.}4}{10},\frac{n}{30},$ which means that

two sales returns can be made within $10$ days of the invoice date and no returns thereafter.

the customer can deduct a $4\mathrm{.}4\%$ discount if the bill is paid between the $10$ th and $30$ th day from the invoice date.

the customer must pay the bill within $10$ days.