My ex is self employed and seems to think he should be paying me £92 a week in maintenance. He has suggested £600 a month in maintenance and is saying he is paying above and beyond. 
My question is how do I work out maintenance backwards to get to the amount he therefore thinks he earns? I think he's way off the mark, bearing in mind he has submitted papers for our divorce (nisi is stamped) and stated £65k annual income.
We are bordering amicable, not going through mediation so I need to reassure myself he is playing fair. He generally is fair...but OW may be having an impact.