PLEASE explain each step

Debt Service Coverage Ratio Total Debt Short-term debt Long-term debt Total debt Principle $5,000 $12,000 Interest 3.5% 5.0% ? ? $82,650 $31,780 Income statement Revenue COGS Gross Margin Marketing and Promotion General and Administrative EBITDA $14,800 $6,310 Capex $4,900 Include Capex Exclude Capex Debt service coverage