Project C: Marketing/Advertising Campaign

• A major new marketing/advertising campaign, which will cost $2 million per year and last 6 years.
• It is forecast that the campaign will increase sales/revenues and costs of sales by 15% per year.
• Annual sales for the previous year were $20 million.
• The marginal corporate tax rate is presumed to be 25%.
• Being a moderate risk investment, the required rate of return of the project is 10%.

In evaluating this, my payback period was calculated as -0.03. is it possible to get a negative payback period? or is there an error in my calculations?