The farmer must pay for the product ($5.25 per dose if the product is used on at least 60 percent of the cows in the herd). The cow must eat more food to support its increased milk production. Revenue comes from the sale of extra milk, typically 8 to 12 pounds per cow per day, at a price of 11 to 15 cents per pound. This cycle is repeated every 14 days, as the cow receives a new injection. For some farms, there are additional costs associated with additional labor to sort and inject cows. In general, there are little or no capital costs associated with its use. On some farms, modifications to cow handling or feeding systems are required to adopt the use of rbST, but these costs are generally small relative to the profit and break-even point. The return on investment is quickly obtained (Fetrow,