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قام empleado السNES بمبلغ 150 * 0.8 = 120 دولار.
بما في ذلك المبلغ الذي دفعه، потратил 120 + 80 = 200 دولار.
حصل على 10 + 30 = 40 دولارًا من التغيير.
لذلك تكلفة NES كانت 200 - 40 = 160 دولار.
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