Interfacing rotary encoders to PIC

[elpis]

hi i wanted something similar ti this but with 4 rotary indication

http://www.electronics-lab.com/blog/?p=7654

or this

http://www.electronics-lab.com/blog/?tag=rotary-encoder

basically what i want is to have a display that will show the level of ecah rotary could anyone help me please tell me how much it will cost

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