we are manufacturing a mineral item by precuring limestone from mines and manufacturing it into powder and grit which has high contents of calcium(minerals) and this product is sold to feed mills as additives for manufacturing feed. we are procuring limestone under HSN code 2521 which is taxable @5%. can we sell our product under HSN code 2309 which is Preparations of a kind used in animal feed (taxable@nil). What will be the GST on freight when we will sell our product to our dealers (feed mills) who are unregistered. who is liable to pay the GST on freight when the recepient party is unregistered. pls guide.