Current Attempt in Progress

The credit terms offered to a customer by a business firm are $\backslash (3\mathrm{.}5/10,\backslash$mathrm$\{$n$\}/30\backslash ),$ which means that

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

the customer can deduct a $3\mathrm{.}5\backslash \%$ discount if the bill is paid between the $10$th and $30$th day from the invoice date. the customer can deduct a $\backslash (3\mathrm{.}5\backslash \%\backslash )$ discount if the bill is paid within $10$ days of the invoice date.