how do i calculate production and capacity,marketing on a new bakery/cafe.???

Are you trying to figure out your COGS, or cost of goods sold. I had help from a great member on here, scp1127 I think. I can try to help. What exactly are you trying to do.

well.Im trying to figure out a marketing plan,capacity,strategic plan for my bakery where we planning on making cakes,cookies, breads,pastries,etc in another words a good business plan?

To put together a marketing strategy you can start by looking at your competitive advantages, which markets you will be targeting with which products, how to reach the customers in those target markets, and what the local demographics are.

On the production side you can put together some sample timelines based on your existing manpower and equipment to see how long each step of the production process for each product will take. Then you can look at integrating those processes to minimize slack time.