After Mr. S had been in business for a year, he ascertained the following facts:

Sales - $80,000; Raw materials used during the year at cost - $30,000; Labor - $50,000; Overhead - $8,000; Work-in-process inventory, 12/31, at cost - $18,000;

Finished goods inventory, 12/31, at selling price - $25,000

Assume that the mark-up has remained constant. The cost of manufacturing goods during the year was?