For income items, they knew yearly amounts. For expenses, in some cases they knew the yearly amount (for example, Marge's commuter train pass). They listed those amounts and noted them as much. Unfortunately, for other expenses, they provided last month's payment, stating that the amount didn't change much from month to month. Based on their employer-provided health insurance, they incur a copay of $35 per visit. They estimated that they saw the doctor (combined) 7 times during the year. Marge estimated that she spends about $125 a month on clothing and $150 a month on groceries. . They went on a Princess Cruise trip that cost $1,750. They took an additional $500 of spending money. That was their only vacation.