@Melissa Koon
I would use reasonable methods to determine the breakout of the cost on the invoice between those components if you can't get the company to cooperate. You also have bonus depreciation, 179 expensing, and this exception as well:
Small taxpayer exception for eligible building property
Qualifying small taxpayers can elect to deduct the cost of improvements made to eligible building property (Regs. Sec. 1.263(a)-3(h)). Qualifying small taxpayers have $10 million or less in average annual gross receipts for the three preceding tax years, and eligible building property includes a unit of property constituting a building, condominium, cooperative, or leased building or portion of a building with an unadjusted basis of $1 million or less. To be eligible for the exception, the total amount of repairs, maintenance, and improvements for the property for the tax year may not exceed the lesser of $10,000 or 2% of the property's unadjusted basis. If the total amount paid exceeds the safe-harbor threshold, the safe harbor does not apply to any amounts spent during the tax year.