. A music, specialises in machines, many orderd have midi (musical instrumet MIDI digital interface) which enables a computer to be linked and any other machine can either be portable or fixed. The shop stocks second hand machines. Part of the manager report reflecting the stock position reads currently- 31 of which 8 are second hand New MIDI 17 of which 12 machine are portable
17machine are portable 14 having MIDI
We currently have no MIDI second haw, no fixed on non-midi, second hand portable MIDI You are required.

how many machine have MIDI
how many machine are portable
how many machine are new portable