[Progress.063] Letter full of jargons

I mentioned about the shocking extra charge our builder asked the other day, we received a letter full of jargons, basically saying how more than 50% of the $89xx we paid were already spent and the quote was for the other half and shows some figures explaining why we need to pay extra $890... We will be meeting the supervisor sometime next week, will wait and see how he is going to explain it. But looks like we don't have any knowledge to fight against all those jargons they used. See how it goes...