Sunflower oil RFQ from Spain

we need to buy the merchandise described below:
SUNFLOWER OIL in all formats that you pack.

When calculating the price, be competitive, the competence is there too.

Please tell me,

1. Under which quality certificate do you pack?.
2. To include a picture of the product help when selling.
3. Samples, in the case that customer would like to see, will you send it? Free of any charges?.
4. Prices FOB - How long are these prices valid?.