Calculating Long-Term Prior Tenant Vacancy Increase

Q A long-term tenant, who lived in the same apartment for 40 years, died recently. I wish to verify the calculation of the new rent. If I calculate the prior legal rent, plus the long-term prior tenant increase, plus the Rent Guidelines Board Order (RGBO) #40 percentage increase, plus 1/40th of the cost of improvements, would this be the allowable computation?