Facebook Inc. is conducting a break-even analysis for its advertising services division. The division's fixed costs amount to $2,000,000, and the variable costs per ad impression are $0.05. The selling price per ad impression is $0.10. Perform a break-even analysis to determine the number of ad impressions needed to break even. Conduct a sensitivity analysis to assess the impact of changes in variable costs and selling prices on the break-even point and profitability.