Consider the following low-spin complexes
$\mathrm{K}_{3}\left[\mathrm{Co}\left(\mathrm{NO}_{2}\right)_{6}\right], \mathrm{K}_{4}\left[\mathrm{Fe}(\mathrm{CN})_{6}\right], \mathrm{K}_{3}\left[\mathrm{Fe}(\mathrm{CN})_{6}\right], \mathrm{Cu}_{2}\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]$ and $\mathrm{Zn}_{2}\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]$.
The sum of the spin-only magnetic moment values of complexes having yellow colour is $\_\_\_\_$
B.M. (answer in nearest integer)