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          transaction that commonly or frequently occurs in the type of               
          business involved.  Deputy v. DuPont, 308 U.S. 488, 495 (1940).             
          A “necessary” expense is one that is “appropriate and helpful” to           
          the taxpayer’s business.  Welch v. Helvering, 290 U.S. at 113.              
          Expenses allowable under section 162 must be “directly connected            
          with or pertaining to the taxpayer’s trade or business”.  Sec.              
          1.162-1(a), Income Tax Regs.  Personal, living, and family                  
          expenses are not deductible.  Sec. 262(a).                                  
               Generally, if a claimed business expense is deductible, but            
          the taxpayer is unable to substantiate it fully, the Court is               
          permitted to make an approximation of an allowable amount (the              
          Cohan rule).  Cohan v. Commissioner, 39 F.2d 540, 543-544 (2d               
          Cir. 1930).  The estimate, however, must have a reasonable                  
          evidentiary basis.  Vanicek v. Commissioner, 85 T.C. 731, 743               
          (1985).                                                                     
               Respondent asserts for the first time in his trial                     
          memorandum that certain of petitioner’s Schedule C deductions are           
          also subject to the requirements of section 274.  Section 274               
          supersedes the Cohan rule, see sec. 1.274-5T(a), Temporary Income           
          Tax Regs., 50 Fed. Reg. 46014 (Nov. 6, 1985), and imposes more              
          stringent substantiation requirements for travel, meals and                 
          entertainment, gifts, and with respect to any listed property as            
          defined in section 280F(d)(4).  Sec. 274(d).  Listed property               
          includes any passenger automobile.  Sec. 280F(d)(4)(A)(i).                  
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