Help with Econ calc,please

If (S1-So)/ So=.01 with s1=6, (6-So)/ So=.01 How does CFA come up with, So= SKR 5.94 per $ How are they doing the calc?

6-S0 = 0.01 So 1.01 So = 6 S0 = 6/1.01 = 5.94