fixed cost of$1400, printing cost .40 cents selling price $1.05, linear cost function ?
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kost=1400+0.4x, weer x=how much yu make

perhaps yu interested in brake-even=weer $ take in=kost

take in=1.05$*(number sell)=x

so 1.05x=1400+0.4x

0.65x=1400

x=1400/0.65

=2,154
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