Yes of course you can!
You need to convert to Canadian Dollars, just the same as you have to convert your US Dollars sales to Canadian Dollars.
You should use the Average Rate for the period that you can find at the Bank Of Canada Website. If you are an annual filer it's easy because BoC provides an annual average. If your reporting quarterly you might have to take the Monthly numbers and average those.
https://www.bankofcanada.ca/rates/exchange/monthly-exchange-rates/
https://www.bankofcanada.ca/rates/exchange/annual-average-exchange-rates/

"What else could I do? I had no trade so I became a peddler" - Lazarus Greenberg 1915
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