The following information is available from Dust Corporations accounting records for the year ended December 31, 2019:

Cash received from customers	$620,000
Investment revenue recognized	30,000
Cash paid to suppliers and employees	510,000
Advertising Expense	95,000
Cash dividends paid	30,000
Depreciation of fixed assets	15,000
Bad debt expense	12,500

Required:

1. Compute cash flow provided by operations for 2019.
2. Justify the exclusion of any of the above items from calculating cash flow from operating activities?