In Mail Boxes, etc., U.S.A. v. Industrial Comm. of Arizona, 181 Ariz. 119, 888 P.2d 777 (Ariz. 1995), the Arizona Supreme Court was required to determine a self-employed claimant's average monthly wage in a situation where claimant never was paid a wage and where the sole proprietorship lost money during the year the claimant was injured. 888 P.2d 778-79. Although never paid a wage, it was established that the claimant worked an average of 50 hours per week, approximately, and the fair value of his services as a general manager was $8 per hour. Id. at 778. The administrative law judge ("ALJ") who initially heard the case determined that the claimant's average monthly wage was approximately $1,733.32; that figure was calculated by multiplying $400 ($8 by 50) by the number of weeks in a month. Id. at 779 n.1. The Arizona Supreme Court held that in such a situation the appropriate way to measure the lost earning capacity of a self-employed individual was the market value of the claimant's services to the sole proprietorship. Id. at 780-81. The Court affirmed the ALJ's decision that the market value of the claimant's services was $1,733.32 per month because that was the amount the sole proprietorship would have had to pay a general manager if the claimant had been merely a passive investor in the company. Id. at 781.