$(5$ points$)$ A London dealer quotes the price of gold at $$ ounce $847\mathrm{.}00-848\mathrm{.}00.$ The spot exchange rate is $\frac{}{}1\mathrm{.}15-1\mathrm{.}16.$ A dealer in Frankfurt quotes the price of gold at $\frac{}{?}$ ounce $900\mathrm{.}00-920\mathrm{.}00.$

Summary of quotes:

$\backslash$table$[[,$bid,ask$],[\frac{}{?}$ ounce,$847\mathrm{.}00/$ounce$,848\mathrm{.}00/$ounce$],[\frac{}{},\frac{1\mathrm{.}15}{}1\mathrm{.}00,\frac{1\mathrm{.}16}{}1\mathrm{.}00$