Example $3.$ A business has the following items: Money received from customers

$80,000$; Money paid to suppliers $50,000$;$70,000$ paid for the purchase of a car;

Stockholder contributions $80,000$; Paid $35,000$ to pay back a loan. Purchases of

shares of the Company $"$B$"12,000$; Issue of Bonds and Obligations $20,000$; Cash at

the biginning of the period $12,000.$ Based on this information calculate Cash Flow

Statement.