I am currently using Becker to study BEC and i am on chapter 5, Topic 6 and am taking the MCQ's from Passmaster.  The question i have an issue with is rather long.  Its question CPA-03809.  It asks for the purchases of merchandise that the company will need to make.  Beckers answer says that you need to take the next months sales x cost% x inventory%.  I dont understand why you take the cost% as within the question it says that inventory is 10% of sales, not the gross profit. 

Can someone clarify this for me? 

I also feel like Becker makes a lot of mistakes.  I actually emailed them yesterday about a problem and they told me they made a mistake and i should refer to their technical bulletin as they have addressed this.  Does anyone else think its crazy that we pay all this money and they cant get the answer right.  Its extremely confusing when you think you have something right, they tell you its wrong, then you second guess yourself, when you were actually right.  Plus, has anyone looked at the technical bulletin for IT.  Half of it is Becker telling us that the national instructor gave us the wrong information.  Its absolutely unbelievable.  Its like 16 pages of how he said the wrong stuff.  They should have remade the lecture or issued a refund.  Thoughts anyone?