24 Hour Fitness sells gym membership. During the month with the lowest level of activity, 24 Hour Fitness incurred total costs of $57,000 when 6,000 memberships were sold. During the month with the highest level of activity, 24 Hour Fitness incurred total costs of $76,000 when 9,800 memberships were sold. Use the high-low method to estimate 24 Hour Fitness's total costs if 8,550 memberships are sold