I need help to verify that I did the following equations correctlyI would really appreciate it if you could explain if its wrong

1. Current Ratio = Current Assets/Current Liabilities ?

2. Days Sales In Receivables = Ending Net Accounts Receivable (accounts receivable - allowance for doubtful accounts)/Credit Sales (sales - sales returns - warranty expense)/360?

3. Doubtful Accounts Ratio = Allowance For Doubtful Accounts/Ending Gross Receivables (accounts receivable + other receivables + allowance for doubtful accounts)?

4. Days Sales In Inventory = Ending Inventory (inventory - reserve for inventory obsolescence)/Cost Of Goods Sold/360?

Thank you so much!