Preface: From this question, we know that experience(XP) is shared among all participants for each enemy killed. You can see your XP meter increasing as enemies are killed, so that's fairly obvious. Once the final enemy in the wave is killed, you get an additional lump sum of XP from somewhere. In this question, it is hinted at that getting more score multipliers increases the amount of XP that you get, but this can't be factored into the XP from killing since multipliers aren't determined until the end of the round.
Question: Considering all of the information above, does the extra bonus XP at the end of a wave correspond directly to your score for that round? Or is it from something else entirely?
For example, I start with 0 XP and complete a wave by killing enemies worth a total of 10 XP. If my score for that wave (after multipliers have been taken into account) is 25, does that mean that I now have 35 XP?