Fusion of chromite ore with sodium carbonate in free excess of air gives two  compounds X and Y(contains transition metals) along with $C{O}_2$ . 
Sum of the spin –  only magnetic moments (nearest integer)of the transition metal ions  in X and Y is____
(Given that: Among X and Y , if any compound contains two or more than two  transition metals, then consider average oxidation state for calculating spin – only  magnetic moments)
(Given that: $\sqrt{2}=1.4$ , $\sqrt{3}=1.7$ ,$\sqrt{5}=2.2$  , $\sqrt{7}=2.6$ , $\sqrt{8}=2.8$ , $\sqrt{35}=5.9$ )