What does X and Y mean and how do i collect it from companys annual report?

Rit = (1 + x + Y)Pit - Pio YPni + DPSit Pio + YPni Where Rit: Rate of return on stock i in year t. Pit: Price of share i at the end of year t. Pio: Price of share i at the beginning of year t. Pri: Nominal value of share i. DPS : Cash dividend share i in year t. X: % increase in capital from reserves location. Y: % increase in capital from receivables and cash incoming