From the MACS Technical Think tankMixed/Cross-contaminated Refrigerant When a vehicle arrives at your shop for A/C service, try to determine if you might be about to work on a contaminated…

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ROI or “return on investment” is what you get for what you spent, whether it’s time or money. You’ve spent money on your business and tools and you expect a fair return. You put money into bank accounts and accrue interest. Hopefully, your stock investments pay regular dividends as well.

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