Hi,
Can you show screen shot of condition types maintained under line 380 to 420. Also check if VAT is getting calculated once or twice. Because you are calculating VAT figures at 90, 130, 150, 160, 240 and again adding them at 430. Try making 90 to 240 as statistical conditions also mark "accruals" check box in each VAT condition type. Make sure you don't mark sub-total condition type not a statistical condition type and "Su Tot" is marked as S.
Is there any special reason that you are creating separate condition type for sub-total. You can calculate sub-total without condition type and then consider that value for further calculation.
Hope this may be helpful to you.
Thanks,
Sagar