Need help with algebra word problem?

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laurrrennn

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If someone could give me a detailed explanation of how to do on of these problems it would be a big help! Can't find any examples in my math book!

A computer company is introducing a new line of computers.

For the FIRST year, the fixed cost for setting up the production line = $140,000.

The variable costs for producing each computer = $475.

The sales dept predicts that 375 comps can be sold during the first yr.

The revenue from each computer = $1100.

Find:

1. the total cost C(x) of producing x comps
2. the total revenue R(x) from the sale of x computers
3. the total profit P(x)
4. the profit or loss from the production and sale of 340 computers; then of 150 computers
5. the break-even point
 
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