Macroeconomics GDP Question?

So here's the question:

Suppose there are two firms in an economy: A and B. A produces timber and sells it to B, which produces and sells tables. Neither firm had any inventory at the beginning of 2000. During that year, A produced enough timber for 50 tables. B bought 70% of that timber for $700 (each table takes $20 worth of timber) and promised to buy the other 30% in 2001. B produced 35 tables in 2000 and sold them for $30 each. What was the economy's GDP for 2000?

Now here's what I was doing-

GDP=Y= Consumption + Investment + Gov't Purchases + Net Export

C= 35x30=1050

I=700

G=0

NX=O

Therefore Y=1050+700=1750?

Please let me know if I'm on the right track and where I need to go and what to do!

Thanks!