What is the weekly cost of coffee waste if the waste is 2,800g and coffee costs $20/kg?

To determine the weekly cost of coffee waste, start by calculating how much the waste weighs in kilograms. Since 2,800 grams is equal to 2.8 kilograms (because there are 1,000 grams in a kilogram), you use that figure to find the cost.

Next, multiply the weight of the wasted coffee (2.8 kg) by the cost per kilogram ($20). So, the calculation would be:

2.8 kg * $20/kg = $56.

This shows that the total cost associated with the wasted coffee is $56 for the week. This numerical reasoning clearly leads to the correct answer, which aligns with proper calculations used in cost management, ensuring a barista or cafe owner can effectively track and minimize losses from waste.