First, competitive equilibrium requires a uniform rate of return over constant capital valued at its "price", not its Marxian value, contrary to what is done in table 2 above. Second, competitive prices result from the sum of costs valued at the "prices" of things, not as amounts of embodied labour. Thus, both Marx's calculation of formula_25 and the sums of his price formulas do not add up in all the normal cases, where, as in the above example, relative competitive prices differ from relative Marxian values. Marx noted this but thought that it was not significant, stating in chapter 9 of volume 3 of "Capital" that "Our present analysis does not necessitate a closer examination of this point."