Table:
| (In millions) |  |  |
| --- | --- | --- |
| June 30, | 2019 | 2018 |
| Land | $ 1,540 | $ 1,254 |
| Buildings and improvements | 26,288 | 20,604 |
| Leasehold improvements | 5,316 | 4,735 |
| Computer equipment and software | 33,823 | 27,633 |
| Furniture and equipment | 4,840 | 4,457 |
| Total, at cost | 71,807 | 58,683 |
| Accumulated depreciation | (35,330) | (29,223) |
| Total, net | $  36,477 | $  29,460 |
Paragraphs:
NOTE 7 — PROPERTY AND EQUIPMENT
The components of property and equipment were as follows:
During fiscal years 2019, 2018, and 2017, depreciation expense was $9.7 billion, $7.7 billion, and $6.1 billion, respectively. We have committed $4.0 billion for the construction of new buildings, building improvements, and leasehold improvements as of June 30, 2019.
Question:
How much was the average depreciation expense over the 3 year period from 2017 to 2019?
Answer: ($9.7+7.7+6.1)/(2019-2017+1) = 7.83