If cost of goods sold during the year is $500,000, inventory is $80,000 on January 1 and $64,000 on December 31, and accounts payable is $12,000 on January 1 and $15,000 on December 31, the amount of cash paid for inventory during the year would be:

a) $519,000 b) $513,000 c) $487,000 d) $481,000