$33.$ A city with a $1\mathrm{.}25$ multiplier effect receives $50$ Million visitors in total $($both domestic and international$)$ each tourist spending on average $1,000$ USD within the city. Using the simple economic impact formula $($Economic impact $=$ Number of Tourists $*$ Average Spending per Visitor $*$ Multiplier$),$ we calculate the economic impact of tourism for this city. Which of the following is the correct result of this calculation?

Group of answer choices

Depends on the currency of the visitors

$50$ Billion USD

$75$ Billion USD

$62\mathrm{.}5$ Billion USD

We cannot determine