Selling to the wholesale market usually earns 10–20% of the retail price, but direct-to-consumer selling earns 100%. Although highly variable, a conventional farm may return a few hundred to a few thousand dollars (US) per acre ($0.03/m2 to $0.30/m2) but an efficient market garden can earn in the $10,000–15,000 per acre ($3/m2 to $5/m2) range, or even higher. However, the size of a market garden has a practical upper bound based on this model, but with conventional farming can farm vast areas because access to a direct market is not a requirement.