Cost often means minus (note this is for the customer buying something; if it is an employee selling something, it would be addition). For an example of a customer, "Sarah had $30 and the pair of headphones she boughtcost $20, how much does she have left?" In this case, the equation would be set up like: 30-20=... Sarah would have had $10 left in the situation. Here is an example for an employee, "A manager in a store is in charge of the cash register. The cash register already has $100 in it and a customer buys a set of headphones that cost $20, How much does the manager have?" This equation would be set up like this: 100+20=... and this would equal 120.
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profit = selling price - (cost of buying + overheads)
something that increases the amount of the total cost of the item by the government
what does key mean in math
figure math means figure math
the mean (in math) is the average of all the numbers in the problem