I am looking to setup a margin account table to answer a question in my finance case but am not sure how.

This is the question:

Assume that the company hedges using the futures contracts, and the settlement prices on the futures contract used change as in the table below. The company's broker demands an initial margin of $600,000 and a maintenance margin of $500,000. Set up a margin account table using these settlement prices, assuming that any excess over the initial margin will be withdrawn and deposited into the company's bank account.