Both the buyer and seller must complete IRS Form 8594 during the sale to report the sale and purchase of business assets. Question: Brown Company is considering the purchase of Orange Company.Here's how we look up the price it's a formula in Excel called index so equals index and it's going to want the row number and the column number. A buy and sell agreement stipulates how a partner's share of a business may be transferred should that partner die or leave the business. The formula to calculate gross sales is Total Units Sold x Original Sale Price = Gross Sales.