An orthogonal cutting operation is performed using a single point cutting tool with a rake angle of $12^{\circ}$ on a lathe. During turning, the cutting force and the friction force are $\text{1000 N}$ and $\text{600 N}$, respectively. If the chip thickness and the uncut chip thickness during turning are $\text{1.5 mm}$ and $\text{0.75 mm}$, respectively, then the shear force is ________$\text{N}$ ($\textit{round off to two decimal places}$).