I have filled in most of the spots for the income statement however, it keeps telling me that the increase in computer supplies (19,505) is wrong,

I have filled in most of the spots for the income statement however, it keeps telling me that the increase in computer supplies (19,505) is wrong, Decrease in Pre-paid Insurance (579) is wrong and i have tried them both as positive and negative answers. I also can't figure out how to get the Cash Balance at December 31 2017.