If the cost of producing each unit of a good is R117,75, which of the following formulae will give the total cost \( (y) \) of producing \( z \) units of the good?

To calculate the total cost of producing \( z \) units when each unit costs R117,75, you simply multiply the unit cost by the number of units. Hence, the formula would be \( y = 117.75 \times z \). This straightforward multiplication will give you the total cost, making budgeting a breeze! Interestingly, this concept of total cost isn't just an abstract idea; it's foundational in businesses from small bakeries to major car manufacturers. Understanding how to calculate and manage costs is essential for profitability and making informed decisions—like whether to scale production or explore new product lines.