Please work out this equation. i do not want to use what is already in this system as there is no explanation and break down of how solution was found. "Benaco is a large firm sells seeds to farmers. It costs $10 to make each kilogram (kg) of seed. They sell each kg for $55. If they have more seed than demanded by farmers, the remaining seed is sent overseas. They only earn $5 per kg from the overseas market. If demand exceeds their quantity, then the sales are lost. As a forecast for demand they will use a normal distribution with a mean of 250,000 and a standard deviation of 106,000. How many kilograms (in '000) should they have in the warehouse before the next growing season?"