You hold the positions in the table below.

Price Shares Beta

Amazon.com $ $52\mathrm{.}001824\mathrm{.}37$

Family Dollar Stores $31\mathrm{.}002112\mathrm{.}10$

McKesson Corp. $78\mathrm{.}001260\mathrm{.}77$

Schering$-$Plough Corp. $31\mathrm{.}004710\mathrm{.}34$

What is the beta of your portfolio? $($Do not round intermediate calculations and round your final answer to $2$ decimal places.$)$