Measuring one important factor in accounting theory spoke for measuring expenses , as well as select elements of expenses and cost elements ?

Costs are generally Classified as Fixed Costs and Variable costs depends upon their nature to constitute the total cost.

Fixed Costs:

 A cost that does not change with an increase or decrease in the amount of goods or services produced. Fixed costs are expenses that have to be paid by a company, independent of any business activity. It is one of the two components of the total cost of a good or service, along with variable cost.

Variable costs 

are those costs that vary depending on a company's production volume; they rise as production increases and fall as production decreases. Variable costs differ from fixed costs such as rent, advertising, insurance and office supplies, which tend to remain the same regardless of production output.

Total cost calculation is based on Fixed Costs + Variable costs.

or

Prime Cost+Factory Overheads=Factory cost + Selling and Distribution Overheads=Cost of Sales+profit = Sales Revenue.  

Operational Expenses

Non Operational Expenses

Capital Expenditures

Controllable expenses

Non Controllable Expenses

Fixed Expenses

Variable Expenses