A an agent engaged in carrying on for B a business in which it is the custom to invest from time to ...........

A, an agent engaged in carrying on for B a business, in which it is the custom to invest from time-to-time, at interest, the moneys which may be in hand, omits to make such investments.

A need not make good to B the interest usually obtained by such investments

A can partially make good to B the interest usually obtained by such investments