A bank in Toronto charges $2\mathrm{.}50\%$ commission to buy and sell currencies. Assume that the current exchange rate is US$$1=$ C$$1\mathrm{.}3101.$

a$.$ How many Canadian dollars will you have to pay to purchase US$$1,450?$

b$.$ How much commission in Canadian dollars $($C$$)$ will you pay the bank for the above transaction?