Arkham University raises $$28,500,000$ dollars by issuing sinking fund bonds. The bonds will have a maturity of $21$ years and pay semi$-$annual coupons of $5\mathrm{.}3\%.$ Arkham University will also need to set up a sinking fund to provide for the retirement of the debt in full in $21$ years. The interest rate on the sinking fund is $3\mathrm{.}0\%$ compounded semi$-$annually. Calculate the periodic cost of the debt for Arkham University.