Cirrus Inc. purchased certain plant assets under a deferred payment contract. The agreement was to pay $40,000 per for ten years. The plant assets should be valued at (a) $400,000 (b) $400,000 plus imputed interest (c) present value of $40,000 annuity for ten years at an imputed interest rate (d) future value of $40,000 annuity for ten years at an imputed rate