We have entered into certain arrangements with developers whereby we have committed to purchase vacation ownership units at a future date to be marketed and sold under our Hilton Grand Vacations brand. As of March 31, 2019, we were committed to purchase approximately $527 million of inventory and land over a period of twelve years. The ultimate amount and timing of the acquisitions is subject to change pursuant to the terms of the respective arrangements, which could also allow for cancellation in certain circumstances. During the three months ended March 31, 2019 and 2018, we purchased $9 million and $4 million, respectively, of VOI inventory as required under our commitments. As of March 31, 2019, our remaining obligation pursuant to these arrangements was expected to be incurred as follows:

($ in millions)	Purchase Obligations
Year
2019 (remaining)	$	119
2020		162
2021		84
2022		56
2023		52
Thereafter		54
Total	$	527

We are involved in litigation arising from the normal course of business, some of which includes claims for substantial sums. Management has evaluated these legal matters and we believe an unfavorable outcome is either reasonably possible or remote and/or for which possible losses are not reasonably estimable. While the ultimate results of claims and litigation cannot be predicted with certainty, we expect that the ultimate resolution of all pending or threatened claims and litigation as of March 31, 2019, will not have a material effect on our unaudited condensed consolidated financial statements.