Answer: The total cost is $735.
Step-by-step explanation: Given that we have budgeted $35 a day per person and our group has 3 people total for a week.
We are to find the total cost.
We know that
there are 7 days in a week, so the cost of one person in a week will be

Since there are 3 persons in our group, so the total cost is given by

Thus, the total cost is $735.