Compute cash flows from investing activities using the following company information.
Sale of short-term investments . . . . . . . . . . $16,000
Cash collections from customers . . . . . . . . . 44,000
Purchase of used equipment . . . . . . . . . . . . . 10,000
Depreciation expense . . . . . . . . . . . . . . . . . . 6,000