Analyze the following scenario: The Hospital for Ordinary Surgery uses pharmaceuticals for its patients. It started the year on January 1, with an inventory of 1,000 doses of an antibiotic drug that cost $17 per dose. On January 2, it purchased another 300 does for $21 each. From January 3 through June 30 it used 800 doses. On July 1, it bought 500 more doses at $23 each. From July 2 through the end of the year it used 400 doses.