Accounts attempt order

So i start accounts paper from section b , attempt it serial wise and then move onto part A 6 markers, and then the rest. As, now on screen checking will be there , many are saying one should attempt it in serial order only. Shall i change my approach or is it too late to do so? I do attempt the questions of 3 mark together in serial and so on. Just that i start from 6 markers and go in reverse.