[onphonenow]

Correct. The math is actually about 500 electron launches.

That is to replace the cost of launching one SLS. If you include development costs cancelling out SLS now would easily save $4B per launch + 10B+ of dev costs.

I think the proposal would be to open up funding for both additional launches AND additional science missions. For the let's say $6B/year or so, you could do a huge amount.