P i denotes the production cost for item i and F the amount of ethanol produced in the specific process.
Then there are the seemingly endless stationery costs for items such as a paper trimmer, pens and marking stamps.
A Studies show that with a green building, you can save 20 to 70 percent in operating costs for items like fuel, electricity and repairs.
Large retailers that have cut their in-store credit costs for items such as fridges and washing machines are reporting a pick-up in sales.
The shipping costs for items like oak desks are often more than the selling prices, Mr. Bullock said, and buyers often back out once they realize that they have to pay the shipping costs.
Arcane to the layman, commodities futures are essential to many businesses, like food manufacturers and fuel suppliers, which use them to help set prices and predict costs for items as varied as corn flakes, blue jeans and mocha lattes.
They face many uncertainties, and their profits can be wiped out by bad weather, rising costs for items like fertilizer, fuel or seed, or unstable crop prices, which can plummet as rapidly as they rise.
For those who have never booked a cruise, the primary deal-breaker is the cost, with 33 percent considering the base rate too expensive and an additional 26 percent fearing hidden onboard costs for items like food and drinks, according to a survey by Mintel, a market research firm.
Actuaries, by definition, use probability theory and finance to calculate future costs for items such as life insurance and pension plans.
The decision-relevant costs can be separated into fixed and variable replenishment costs for direct and backroom replenishment, as well as inventory holding costs for items in the showroom and backroom.
Mr Miliband said that as well as falling real wages and rising costs for items including food, childcare, energy and transport, the middle class was facing a more fundamental threat.
