No Frizz Brushes produces a premium hairbrush Total manufacturing costs are $210,000 when 21,000 brushes are produced of this amount, total variable costs are $52,500. What are the total production costs when 28,000 hairbrushes are produced? Assume the same relevant range. (Round intermediary calculations to the nearest cent and round your final answer to the nearest whole dollar.) When 28 000 hairbrushes are produced, total production costs are