Bigcommerce Product upload Via CSV

I need to make csv for Bigcommerce portal..I have attached both sheets please make a sample of one product which have lots of variation of color and size..

I have more than 50000 products so need accurate solution I need only serious bidder..Please make csv and provide quote for 50000 prooduct for my client..

I will ignore bid without sample..so if you have done this before than welcome..