Mr. John pays income tax on the sum above $3000 at a rate of 6 cents per Dollar. If he has $4880 after paying the income tax. What is John's gross income?

প্রশ্নঃ Mr. John pays income tax on the sum above $3000 at a rate of 6 cents per Dollar. If he has $4880 after paying the income tax. What is John's gross income?