$\frac{2}{10},\frac{n}{30}$ is interpreted as

Multiple Choice

$2\%$ discount if paid within $30$ days

$30\%$ discount if paid within $2$ days

$10\%$ cash discount if the whole amount is paid within $2$ days, the balance is due in $30$ days

$30\%$ discount if paid within $10$ days

$2\%$ cash discount if the whole amount is paid within $10$ days, the balance is due in $30$ days