  We consider a single-level quantum dot coupled to magnetic insulators
(magnonic reservoirs) and magnetic metals (electronic reservoirs). The whole
system is in an external magnetic field. In a general case, the system includes
two magnonic and two electronic reservoirs, but we also present results for
some specific situations, where only two or three reservoirs are effectively
connected to the dot. The main objective is the analysis of the conversion of
magnon current to electronic spin and charge currents, and {\it vice versa}. We
consider the limiting case of large Coulomb energy in the dot (Coulomb
blockade), as well as the case when the Coulomb energy is finite and double
occupancy is allowed.
