I know the PSLVs have a reputation of being very reliable. Do you happen to know how much it costs, compared to the Protons or SpaceX's new design? Also, it's

I know the PSLVs have a reputation of being very reliable. Do you happen to know how much it costs, compared to the Protons or SpaceX's new design? Also, it's very cool that India:s launching its own GPS alternatives. The article mentions that it uses the same L5 and S bands as GPS and Galileo: isn't there any potential of interference, and will existing receivers work as-is?