How are stock options treated when diluted earnings per share is computed?

Consider the following activity schedule:
Date Quantity Per Unit Total Cost Jan 1, Beginning Inventory 100 $18.00 $ 1,800.00 Mar 4, Purchase 400
19.00 7,600.00 Apr 1, Sold (50)
In a perpetual inventory system, what is the average cost per unit after the March 4 purchase?

Unrealistically optimistic assumptions about collectability of receivables and loans is an example of

In the Ricardian Model of trade, under autarky (closed economy):

The measure of central tendency which is sensitive to extreme scores on the higher or lower end of a distribution is the: