15) During July, Heron Corporation plans to serve 23,000 customers. Revenue is $6.80 per customer served. Wages and salaries are $39,900 per month plus $2.50 per customer served. Supplies are $1.40 per customer served. Insurance is $10,300 per month. Miscellaneous expenses are $4,800 per month plus $0.20 per customer served Prepare the company's planning budget for July