need help with adc

[CocaColaKid]

    DEFINE  OSC 4               ' Set Xtal Frequency
    DEFINE  ADC_BITS 10         ' Set resolution of conversion
    DEFINE  ADC_CLOCK 8         ' Set clock source (x/FOSC or FRC)
    DEFINE  ADC_SAMPLEUS 50     ' Set sampling time (in uS)

    ADFM    var     ADCON1.7    ' ADC result format select bit
    PCFG3   var     ADCON1.3    ' ADC port configuration bit
    PCFG2   var     ADCON1.2    ' ADC port configuration bit
    PCFG1   var     ADCON1.1    ' ADC port configuration bit
    PCFG0   var     ADCON1.0    ' ADC port configuration bit

    PCFG0 = 0                   ' Configure AN0 as analogue input, others digital 
    PCFG1 = 1
    PCFG2 = 1
    PCFG3 = 1
    ADFM = 1                    ' Right justified result in ADRESL and ADRESH
                               
    adcin 0,adc_in              ' Place the conversion of channel0 into adc_in

For 0-300 lbs output = adc_in * 100 / 341
For 0-400 lbs output = adc_in * 100 / 256

This will give you an output within 1 lb.