During the year ending December 31, 2019, Mary Collins has employment income before the deduction of any RPP contributions of $40,000, a net rental loss of $16,000, interest income of $6,000, and income from royalties of $7,000. The royalties were on a book written by Ms. Collins in her undergraduate years at university. She has no Unused RRSP Deduction Room from previous years. Ms. Collins is a member of a defined contribution Registered Pension Plan in which, during 2019, she has contributed $2,000 and her employer has contributed $3,000. The RRSP Dollar Limit for 2020 is $27,230. Required: What is her maximum deductible Registered Retirement Savings Plan contribution for 2020?