Rates for having a manuscript typed at a certain typing service are $10 per page for the first time a page is typed and $5 per page each time a page is revised. If a certain manuscript has 100 pages, of which 20 were revised only once, 30 were revised twice, and the rest required no revisions, what was the total cost of having the manuscript typed? Answers
A) $1200 B) $1500 C) $1400 D) $1250 E) $1350
50 pages typed 1x   20 pages typed 2x (original + one revision)   30 pages typed 3x (original + two revisions)   50(10)+20(10+5)+30(10+5+5)=500+300+600= 
<gadget id="calculator">500+300+600</gadget>
<output>1_400</output>
1400   Answer - $1400
<result>C</result>
Rates for having a manuscript typed at a certain typing service are $10 per page for the first time a page is typed and $5 per page each time a page is revised. If a certain manuscript has 100 pages, of which 20 were revised only once, 30 were revised twice, and the rest required no revisions, what was the total cost of having the manuscript typed?