Interpret the following credit terms: $\frac{2}{10},$ Net $30.$

a $10$ percent discount can be taken if the balance is paid within $2$ days;

otherwise, the balance is due in $30$ days.

a $2$ percent discount can be taken if the balance is paid within $10$ days;

otherwise, the balance is due in $30$ days.

$20$ percent of the balance is due in $30$ days.

$20$ percent of the balance is due upon receipt, with the remaining balance

due in $30$ days.

a $20$ percent discount can be taken if the balance is paid with $30$ days.