Czech company is searching for suppliers of sunflower pellets

We are searching for suppliers of sunflower pellets. Please calculate the cost of supplies.
Place of delivery: Laziska Gorne, Poland
Diameter - max 20mm
Moisture - max 12%
Ash - max 8%
Calorific value- min 17 GJ/tone
Monthly volume of delivery: up to 800 tons
Terms of delivery: DDU or DDP (INCOTERMS 2000)
Packaging: Big Bаg
Payment:
40% prepayment 14 days before delivery
20% upon delivery
40% to 21 days after delivery