A certain computer manufacturing firm last year produced 80 percent of its computers using parts made by its subsidiary company. If the remaining 10,800 computers were produced using parts purchased from another parts manufacturer, how many computers were produced by the computer manufacturing firm altogether?  Choices:
A) 54,000  B) 64000  C) 62000  D) 60000  E) 68000
80% parts used of subsidary company, so 20% parts used of other companies.   Now, 20% parts = 10,800 computers   So, 1% parts = 10,800/20   Or, 100% parts = 54,000 computers.   Hence answer is (54,000)
<result>A</result>
A certain computer manufacturing firm last year produced 80 percent of its computers using parts made by its subsidiary company. If the remaining 10,800 computers were produced using parts purchased from another parts manufacturer, how many computers were produced by the computer manufacturing firm altogether?