f is formatted output. The format specifier is a parameter of the printf function. The parameters of printf can also vary in use hence printf is variadic: printf( %3.2f\n, someNumber ); //prints a float 3 digits wide and 2 decimal places in precision.
As a result, fixed costs are sometimes called period costs. Some fixed costs are incurred at the discretion of a company's management, such as advertising and promotional expense, while others are not. It is important to remember that all non-discretionary fixed costs will be incurred even if production or sales volume falls to zero.
If fixed costs are $18,000, the variable cost per unit is $70 and you set an initial wholesale selling price of $250 per keg, the point at which your business is neither realizing a profit nor incurring a loss is 100 kegs or 18,000/(250 - 70).