Show how to find the answer to the following question by USING MS EXCEL GOAL SEEK FUNCTION.

A distributer of prewashed shredded lettuce is opening a new plant and considering whether to use a mechanized process or a manual process to prepare the product. The manual process will have a fixed cost of $43,400 per month and a variable cost of $1.80 per 5-pound bag. The mechanized process would have a fixed cost of $84,600 per month and a variable cost of $1.30 per bag. The company expects to sell each bag of shredded lettuce for $2.50. What is the monthly profit or loss if the company chooses the manual process and sells 70,000 bags per month?