Question
On the off chance if you would happen to know what the yield of one tomatoe plant, one zuchini plant, one eggplant, and squash, would be. Given that they are healthy plants of course, what an anticipated average yield would be expected.  
Many Thanks
Louise

Answer
Louise:

This is a difficult question because of the different conditions and types of seeds used. Weather, soil and care are also major factors.

I can make a guess that one good tomato plant could yeild as much as 2 pounds over the growing season.

The others I am at a loss to make a guess.

Best wishes.

Don