Option 1: This option states that Family A spends as much on miscellaneous as family B spends on entertainment. Looking at the tables, we can see that Family A spends 10% on miscellaneous and Family B spends 20% on entertainment. Therefore, this statement is not true.

Option 2: This option states that the food expense of Family B is equal to the total expense of Family A. Looking at the tables, we can see that the food expense of Family B is 30% and the total expense of Family A is 60%. Therefore, this statement is not true.

Option 3: This option states that Families A and B spend equally on food. Looking at the tables, we can see that both families spend 30% on food. Therefore, this statement is true.

Option 4: This option states that Families A and B spend equally on entertainment. Looking at the tables, we can see that Family A does not have any expenditure on entertainment, while Family B spends 20%. Therefore, this statement is not true.

Based on the analysis, the correct statement is Option 3, which states that Families A and B spend equally on food.