Capital Purchases and Finance in AccountRight

Hi There

I am currently studying bookkeeping and I had a exam and the question was Luxry car purchase with chattel mortage and trade in so it is a bit connfusing however what I did I created an account under bank (trade-in clearing) and allocated the N-T tax code. My question is when I do enrty to myob how to split luxry car and trade in basically how to do myob entry ? it is very complicated I am really stuck any help would be great. 

Thanks in advance

Kind Regards