P : Good for corporations.
Q : Good for the United States.
R : Good for you.
S : You buying lots of stuffs.
What is good for corporations is good for the United States. P $\rightarrow$ Q.
What is good for the United States is good for you. Q $\rightarrow$ R.
What is good for the corporations is for you to buy lots of stuff. S $\rightarrow$ P.
1. P $\rightarrow$ Q
2. Q $\rightarrow$ R.
From 1 and 2 by using Hypothetical syllogism. We get 3.
3. P $\rightarrow$ R. which is "Good for corporations is good for you.
4. S $\rightarrow$ P
From 4 and 1 again by using Hypothetical syllogism. We get 5.
5. S $\rightarrow$ Q . which is "Buying lots of good stuffs is good for United states."
Now from 5 and 2 by again using Hypothetical syllogism. We get 6.
6. S $\rightarrow$ R . which is "Buying lots of good stuffs is good for you".
Conclusion : "Buying lots of good stuffs is good for United states and for you".