Pure Water Products produces two types of water filters. One attaches to the faucet and cleans all water that passes through the faucet. The other is a pitcher-filter that only purifies water meant for drinking. Revenue and cost information for each product appears below: ? the unit that attaches to the faucet is sold for $80 and has variable costs of $20 ? the pitcher-filter sells for $90 and has variable costs of $25 ? fixed costs total $775,000 ? Pure Water sells 3 faucet models for every 2 pitcher-filters sold Calculate the number of units of the pitcher-filters that must be sold in order for Pure Water Products to earn a profit of $186,000. Show work