Assuming you're trying to find what the total cost is, this is how I got this answer.
Information:
10 days, with $55 per person, per night.
Tax for 55 people: $27.5
Hotel price for 10 days for 55 people: $27,500
Flight cost for 55 people: $2,750
Summary:
30,250 + 27,500 + 2,750 + 27.5
Total Cost:
$60,527.5
