Refer to the figure showing cyclin-dependent kinases regulating the progress of the cell cycle. 
At what point is the commitment made to another cell cycle?
Definitions:
Present Value
The present value of a sum of money or series of cash flows expected in the future, discounted at a certain rate of return.
Net Present Value
The discrepancy between incoming and outgoing cash flows' current worth over a certain timeframe, utilized in long-term investment planning to evaluate an investment's profit potential.
Future Cash Inflows
The expected receipts of cash in the future from investments, operations, or other sources.
Depreciation
The systematic allocation of the cost of a tangible asset over its useful life, reflecting the asset's consumption, wear and tear, or obsolescence.
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