RTK-1, RTK-2, Tae Kim (free), Assimil Japanese 1+2, KO2001, RTK-3
And an Android or iOS device (might be hard to get them to reimburse, but it'll let you study anywhere, and is more valuable than any other thing you could buy in that price range).
And an Android or iOS device (might be hard to get them to reimburse, but it'll let you study anywhere, and is more valuable than any other thing you could buy in that price range).