Below are four of Keren Inc.'s T-accounts. 1/1 450 1/1 500 12/31 250 Inventory 600 ? 12/31 1,910 ? Notes Receivable 1,700 640 250 1/1 1/1 700 12/31 820 12/31 ? 690 ? Equipment 130 Notes Payable 830 1,300 1,000 Required: (1) Describe the typical activities that will cause each one of the four accounting to increase and decrease. Example for Inventory: Inventory increases when the company buys inventory and decreases when the company sells it. (2) Compute the missing numbers in the T-accounts. Note: each account is independent of each other. Treat them separately. Example for Inventory: 250=450+ 500-600-xx-100