Sodium Bicarbonate industrial grade

we want to import sodium bicarbonate industrial grade from your company
we need its purity 99.5% and it will be better if we can reach its purity to 100.5%
we need from 18 to 25 ton of sodium bicarbonate according to carriage or size of container
we will use from 200 to 250 ton all over the year
after the first year we can increase our quantity to 500 ton