O Working capital cash flow. Cool Water, Inc. sells bottled water. The firm keeps in inventory plastic bottles at 9% of the monthly projected sales. These plastic bottles cost $0.007 each. The monthly sales for the first four months of the coming year are as follows: January: 2,100,000 February: 2,100,000 March: 2,700,000 April: 3,100,000 What is the monthly increase or decrease in cash flow for inventory given that an increase is a use of cash and a decrease is a source of cash? Note: Enter a decrease as a negative number, What is the change in working capital for January? (Round to the nearest dollar.)