An oil sample has an API gravity of $34.5^\circ \text{ API}$. Calculate its density in kilograms per cubic meter ($\text{kg/m}^3$). (Note: Specific Gravity $\text{SG} = \frac{141.5}{\text{API} + 131.5}$, and reference density of water is $\rho_w = 999.0 \text{ kg/m}^3$)