$1\mathrm{.}2$ Use the information provided below to calculate the cost $($as a percentage to two decimal places$)$

$(4$ marks$)$ to Glencoe Stores of forfeiting the discount.

INFORMATION

The credit terms of Marburg Wholesalers to Glencoe Stores are $30$ days but the supplier is prepared to allow a rebate of $2\mathrm{.}5\%$ if Glencoe Stores pays the account within $12$ days.