There are, of course, many variations in the arrangement of details between the landlord and tenant. On many dairy farms in the northeastern states it is customary for the landlord to own the cows. While the landlord and tenant share equally from the sale of milk, butter or cheese, in such cases the increase in the herd belongs to the owner of the land. Hence, money from the sale of any animal, old or young, goes to him. This is because the landlord must keep up the herd. If a cow is sold, he must furnish another to take her place. (c) The third type of tenant farming is where the tenant furnishes nothing but his labor and managerial ability, and receives a share of the sales, which may be one-third. This is rather an unusual type of tenancy, since, where the landlord furnishes all the capital, it is much more common to employ a farm manager at a monthly wage. The wage varies greatly, but is seldom below forty dollars or above seventy-five dollars per month without board, especially to those who have not hitherto had much managerial experience. Various attempts at profit sharing have been made. A recent instance is of a young married man taking 160 acres of tillable land where the landlord has a fairly well-stocked farm. The young man is to have a house and everything in the way of living the farm can furnish. He is to receive $20 a month and one-half the net proceeds, or, what is called in Chapter XI, the farm income. In considering a contract of this kind it is necessary to make a careful distinction between: (1) Gross sales, (2) net proceeds, viz.: the gross sales less the expenses of running the farm, and (3) profits, which may be defined for the purpose of this discussion as the net proceeds less the interest on the investment.[A] Assuming 160 acres of land, all tillable, devoted to dairy farming in eastern United States, gross sales may be estimated at $20 an acre, or an annual gross income of $3,200, and the net proceeds at $10 an acre, or $1,600. Under these conditions the young man's income would be $240, received as wages, plus $800, as his share of the net proceeds, or a total of $1,040 a year. Generally speaking, probably a more satisfactory method, both for landlord and the farm manager, would be to pay the latter as nearly as may be what his services should be worth and give him in addition one-half the profits; that is, one-half of that which was left after deducting the expenses of running the farm and interest on the capital invested.