3. Ponderosa Paint and Glass makes paint at three plants. It then ships the unmarked paint cans to a central warehouse. Plant A supplies 35% of the paint, and past records indicate that the paint is...

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Extracted text: 3. Ponderosa Paint and Glass makes paint at three plants. It then ships the unmarked paint cans to a central warehouse. Plant A supplies 35% of the paint, and past records indicate that the paint is incorrectly mixed 10% of the time. Plant B contributes 40%, with paint mixed incorrectly 5% of the time. Plant C supplies 25%, with paint mixed incorrectly 15% of the time. If Ponderosa guarantees its product and spent $20,000 replacing improperly mixed paint last year, how should the cost be distributed among the three plants?