C $1,166.40
To calculate the total cost of gasoline for the round trip, first, determine the total number of gallons needed for the trip:
Total distance for round trip = 1,701 miles x 2 = 3,402 miles
Total gallons needed = 3,402 miles / 10.5 miles per gallon = 324 gallons
Then, calculate the total cost of gasoline:
Total cost = 324 gallons x $3.60 per gallon = $1,166.40
Therefore, Clinton and Stacy will spend $1,166.40 on gasoline for the round trip to Yellowstone National Park and back home.