@Amor D
Agreed, I hate these types of questions. they give a bunch of unnecessary info and make you wade through all the nonsense to find what you need to answer the question. Basically, for usage/efficiency variances you need budgeted price, budgeted hours (in this case), and actual hours. It takes .5 hours to produce a widget, and they produced 10,000 widgets, so budgeted time was 5,000 hours. Actual time was 3,000 hours. The difference between these is 2,000 hours, and since it took less time than budgeted it is favorable. Multiply this by budgeted price and you have the usage variance.
Easiest way for me to keep things straight is to read the last sentence to find out what is being asked, figure out what I need to know, and look through the nonsense in the rest of the question to find what I need. This works as long as they don't throw any tricks in there to throw us off.