Eddie audited the LoHo Company's inventory on a sample basis. He audited 120 items from an inventory compilation list and discovered net overstatement of $480. The audited items had a book (recorded) value of $48,000. There were 1,200 inventory items listed, and the total inventory book amount was $490,000. Which of these calculations is (are) correct?

a.Known misstatement of $48000 using the average difference method

b.Projected likely misstatement of $480 using the sample stratification method

c.Computed error upper (UEL) of $49,000 using the taintings method

d.Projected likely misstatement of $4,800 using the average difference method