Let us examine our problem anew in the light of this fact. A producer who produces not only commodities but capital must above all create surplus value. The capitalist producer's final goal, his main incentive, is the production of surplus value. The proceeds from the commodities he has manufactured must not only recompense him for all his outlay, but in addition they must yield him a value which does not correspond with any expense on his part, and is pure gain. If we consider the process of production from the point of view of the creation of surplus value, we see that the capital advanced by the capitalist is divided into two parts: the first part represents his expenses on means of production such as premises, raw material, partly finished goods and machinery. The second part is spent on wages. This holds good, even if the capitalist producer does not know it himself, and in spite of the pious stuff about fixed and circulating capital with which he may delude himself and the world. Marx called this first part constant capital. Its value is not changed by its utilisation in the labour process--it is transferred _in toto_ to the finished product. The second part Marx calls the variable capital. This gives rise to an additional value, which materialises when the results of unpaid labour are appropriated. The various components which make up the value of every commodity produced by capitalist methods may be expressed by the formula: _c + v + s_. In this formula _c_ stands for the value of the constant capital laid out in inanimate means of production and transferred to the commodity, _v_ stands for the value of the variable capital advanced in form of wages, and _s_ stands for the surplus value, the additional value of the unpaid part of wage labour. Every type of goods shows these three components of value, whether we consider an individual commodity or the aggregate of commodities as a whole, whether we consider cotton textiles or ballet performances, cast-iron tubes or liberal newspapers. Thus for the capitalist producer the manufacture of commodities is not an end in itself, it is only a means to the appropriation of surplus value. This surplus value, however, can be of no use to the capitalist so long as it remains hidden in the commodity form of the product. Once the commodity has been produced, it must be realised, it must be converted into a form of pure value; that is, into money. All capital expenses incorporated in the commodity must shed their commodity-form and revert to the capitalist as money to make this conversion possible so that he can appropriate the surplus value in cash. The purpose of production is fulfilled only when this conversion has been successful, only when the aggregate of commodities has been sold according to its value. The proceeds of this sale of commodities, the money that has been received for them, contains the same components of value as the former aggregate