In june of this year, dr. and mrs. bret spencer traveled to denver to attend a three-day conference sponsored by the american society of implant dentistry. bret, a practicing oral surgeon, participated in scheduled technical sessions dealing with the latest developments in surgical procedures. on two days, mrs. spencer attended group meetings where various aspects of family tax planning were discussed. on the other day, she went sightseeing. mrs. spencer does not work for her husband, but she does their tax returns and handles the family investments. expenses incurred in connection with the conference are summarized as follows: airfare (two tickets) $2,000lodging (single and double occupancy are the same rate—$250 each day) 750meals ($200 x 3 days)* 600conference registration fee (includes $120 for family tax planning sessions) 620car rental 300*split equally between dr. and mrs. spencer. if an amount is zero, enter "0".how much, if any, of these expenses can the spencers deduct? mrs. spencer's activities do or do not constitute a trade or business. therefore, she can deduct how much of her expenses. bret's deductible expenses are: airfare (one ticket) $lodging meals $ less: cutback adjustment registration fee car rental total $