Classify each of the following changes as increasing or decreasing the operating cash flow:

a. An increase in raw materials inventory.

b. An increase in salaries and wages payable.

c. An increase in accounts receivable.

d. A decrease in raw materials inventory.

e. A decrease in accounts receivable.

f. A decrease in accounts payable.

g. A decrease in finished goods inventory.

h. A decrease in accounts receivable.