Please help asap, thanks!

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Snake Co produced and sold 5,000 units in the month. Below is their financial information:

Selling Price: $20 per unit

Direct Manufacturing Costs: $5 per unit

Fixed Manufacturing Overhead: $20,000

Variable Selling expenses: $3 per unit

Fixed Selling expenses: $5,000

Snake Co is trying to determine whether to use a Contribution Margin income statement or an Absorption Costing income statement. What would be the difference between their Contribution Margin and their Gross Profit?