An accountant and a bookkeeper, as part of a contract dissolving their accounting business, agreed that each would contribute $100,000 to fund an annuity for a clerk who was a longtime employee of the business. The clerk's position would be terminated at the dissolution, and he did not have a retirement plan. The accountant and the bookkeeper informed the clerk of their plan to fund an annuity for him. The clerk, confident about his financial future because of the promised annuity, purchased a retirement home. The accountant later contributed his $100,000 to fund the annuity, but the bookkeeper stated that he could afford to contribute only $50,000. The accountant agreed in writing that the bookkeeper should contribute only $50,000. Does the clerk have a valid basis for an action against the bookkeeper for the unpaid $50,000