Stock and Flow Equations

Accounts track financial activities and summarises the financial state of the company.

Stock accounts describe financial states at a single point in time.

Flow accounts aggregate financial activities over the accounting period.

Updating Stocks

Equations
Accounts Receivable (new) AR (old) + Credit Sales - Collection of Receivables
Inventory (new) Inventory (old) + Credit Purchases - Cost of Goods Sold
PPE (new) PPE (old) + Equipment Purchases - Depreciation
Accounts Payable (new) AP (old) + Credit Purchases - Payment of Payables
Bank Loans (new) Bank Loans (old) + New Loans - Loan Repayment
Mortgages (new) Mortgages (old) + New Mortgage Loan - Principal Repayment
Mortgage Payment Interest Expense + Principal Repayment
Cash (new) Cash (old) + Cash Sales + Collection of Receivables - Payment of Payables - Equipment Purchases - Dividends + New Mortgage Loan + New Bank Loans - Loan Repayment - Mortgage Repayment
Owners Equity (new) Owner's Equity (old) + Retained Earnings
Retained Earnings Net Income - Dividends
Total Revenue Credit Sales + Cash Sales
Total Expenses Cost of Goods Sold + Depreciation + Interest Expense
Net Income Total Revenue - Total Expenses