Productivity is the amount of output per unit of input used. The most common measure of productivity is labor productivity - output per hour worked. The price of a good or service is always determined by the interaction of supply and demand. Supply - The amounts of goods and services that people are willing and able to supply at various prices. Demand - The amounts of goods or services that people are willing and able to buy at various prices.
Money is anything that is generally acceptable in exchange for goods and services.
Money does not necessarily need to have any intrinsic value to serve as a medium of exchange. It is someone's willingness to accept it in payment that gives money its value in the exchange process. Profit is the income left over for the owners of a business after all the costs of production have been paid. Profit is an incentive for entrepreneurs and a reward for taking a risk to start a business. Businesses who make a profit have successfully satisfied the wants of consumers.