$1\mathrm{.}3$ REQUIRED Study the information given below and advise whether Sheppey Stores should use its overdraft facility $($interest rate $18\%$ p$.$a$.)$ to settle the debt within $15$ days. Support your answer with relevant calculations. INFORMATION Semir Wholesalers credit terms to Sheppey Stores are $30$ days but the creditor is prepared to allow a rebate of $2\mathrm{.}5\%$ if Sheppey Stores pays the account within $15$ days. $(4$ marks$)$