Having heard about IPO underpricing, I put in an order to my broker for 1,150 shares of every IPO he can get for me. After 3 months, my investment record is as follows:

IPO	Shares Allocated to Me	Price per Share	Initial Return
A	650	$10	8%
B	350	20	13
C	1,150	8	-2
D	0	12	24

a. What is the average underpricing in dollars of this sample of IPOs?

b. What is the average initial return on my portfolio of shares purchased from the four IPOs that I bid on? When calculating this average initial return, remember to weight by the amount of money invested in each issue