Robert and John are married and have $3$ dependent children and earn a gross biweekly salary of $$4,969.$ They will also make the following tax$-$deductible purchases: Medical expenses: $$6,919$ Educational expenses: $$6,718$When they file their taxes jointly, what will their tax refund be$?$Use the following information: Standard deduction for married couples: $$25,900$ Biweekly allowance: $$165\mathrm{.}38$ per person