-11- curiam T.C. Memo. 1969-159; Tokarski v. Commissioner, 87 T.C. 74, 77 (1986). If taxpayers establish that they have incurred deductible expenses but are unable to substantiate the exact amounts, we can in some circumstances estimate the deductible amounts, but only if the taxpayer presents sufficient evidence to establish a rational basis for making the estimates. See Cohan v. Commissioner, 39 F.2d 540, 543-544 (2d Cir. 1930); Vanicek v. Commissioner, 85 T.C. 731, 742-743 (1985). In estimating the amounts allowable, we bear heavily upon the taxpayer whose inexactitude is of his own making. See Cohan v. Commissioner, supra at 544. We shall not rely on the Cohan rule as petitioners have not presented sufficient evidence to establish a rational basis for making an estimate. Furthermore, the evidence does not establish that petitioners incurred any interest expense or had any cost of goods sold. Accordingly, we sustain respondent’s disallowance of the interest expense, the labor expenses, the Western Timber Farms, Inc. losses, and the cost of goods sold. At trial, petitioners contended that they suffered a $20,000 capital loss related to Orion. The parties tried this issue by consent. See Rule 41(b).4 4 When issues not raised by the pleadings are tried by express or implied consent of the parties, the issues shall be (continued...)Page: Previous 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 NextLast modified: November 10, 2007