请帮我算道英文算术题,It cost a collegeRs.0.70 a copy to produce a Programme for thehomecoming footballgame.If Rs.15,000/- was received for advertisementsin the programme,how many copies at Rs.0.50 a copy must be sold to makea profit ofRs.80

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请帮我算道英文算术题,It cost a collegeRs.0.70 a copy to produce a Programme for thehomecoming footballgame.If Rs.15,000/- was received for advertisementsin the programme,how many copies at Rs.0.50 a copy must be sold to makea profit ofRs.80
请帮我算道英文算术题,
It cost a collegeRs.0.70 a copy to produce a Programme for the
homecoming footballgame.If Rs.15,000/- was received for advertisements
in the programme,how many copies at Rs.0.50 a copy must be sold to make
a profit ofRs.8000/-
刚才找到了答案：广告赚了15000，最后的利润是8000，赔的15000-8000=7000是因为0.7/- 生产而0.5/- 出售，所以出售的数量是（15000-8000）/(0.7-0.5)=35000。这题太不走寻常了，开始怎么我都不肯相信生产成本大于售价。

请帮我算道英文算术题,It cost a collegeRs.0.70 a copy to produce a Programme for thehomecoming footballgame.If Rs.15,000/- was received for advertisementsin the programme,how many copies at Rs.0.50 a copy must be sold to makea profit ofRs.80
received 15000.to get profit of 8000,maximum total cost=15000-80000=7000
if cost per copy is at 0.50,
then the no.of copies=7000/0.5=14000
哦忘了前面还有0.7 ,那就是7000/0.2=35000

请你把它翻译成中文好吗？我英语不好

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