You have received two offers on a building lot that you want to sell. Ms$.$ Armstrong$$s offer is $$25,000$ down plus a $$420,000$ lump sum payment $15$ years from now. Mr$.$ Belcher has offered $$20,000$ down plus $$5000$ at the end of every quarter for $15$ years. Money can earn $7\mathrm{.}3\%$ compounded annually. The present value of Mr$.$ Belcher$$s offer is $\_\_\_\_\_(16)\_\_\_\_\_\_$$$.$ The difference between Ms$.$ Armstrong$$s and Mr$.$ Belcher$$s offer is $\_\_\_\_\_(17)\_\_\_\_$$$.($please input a postive number$)$