Ruth is really hoping that she can earn at least $1,890 in operating income to buy an ATV. How many cards will she need to sell for this to happen? (Round intermediate calculations and final answer to 0 decimal places, e.g. 5,125.) Number of cards units What if she wants $1,890 in operating income after-tax, and her tax rate is 30% ? (Round intermediate calculations and final answer to 0 decimal places, e.g. 5,125.) Number of cards units Attempts: 4 of 5 used