Tree Trimmer's R' Us provides the following information about its tree service:
Depreciation: \$1500 per month
Advertising: \$250 per month
Insurance: \$2500 per month
Materials for tree health: \$5 per tree
Direct labor: \$15 per hour
Fuel: \$3 per tree
Tree Trimmers R' Us charges $50 per tree. What is the company's break-even point in units?