Let X denote the number of cars sold by a sales associate on any given day. Suppose the probability distribution for X is given by the following table.

x	0	1	2	3
P(X = x)	0.3	?	0.2	0.1

a. Suppose the associate makes a day rate of $100 as well as $500 for each car sold. Let Y equal the associate's total daily wages. Find the probability distribution for Y. b. Find E(Y ). Round to two decimal places if necessary.