How can I figure out

Mr$.$ Roelan's has $2019$ earned income for RRSP purposes of $$34000.$ He is not a member of an RPP or a DPSP$.$ His unused RRSP deduction room carried forward from $2019$ was $$36000.$ During $2020,$ he contributes $$2100$ to his RRSP and chooses to deduct the full amount contributed. What is the amount of Mr$.$ Roelan's Unused RRSP deduction room at the end of $2020?$

Round to the nearest dollar. Do NOT write commas, dollar signs, or decimals in your response.

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