1. On a 0% revolving credit account with a $1,000 line of credit, you charged $300 for a new iPhone, $40 for a night out, and $80 for concert tickets. You also made a $200 payment. You started with no...

1. On a 0% revolving credit account with a $1,000 line of credit, you charged $300 for a new iPhone, $40 for a night out, and $80 for concert tickets. You also made a $200 payment. You started with no charges against your account. What is your available credit?

a. $220                                                                  c. $870

b. $780                                                                  d. $1,000