The relationship is not exact, as some people on these forums report the same score breakdowns, yet have a different overall score.
However, there are quite a few 'score grids' that show what scores in each section combine to overall that are pretty accurate. This might help.
Great. That helps. Thanks for sharing. So given I can score 51 in the real test as well (fingers crossed!), somehow I need to stretch my verbal score past 40 consistently to see myself somewhere close to, if not, 750. Well.....