Language C
Description A code that calculates the following:
First 50 units - $0.153/units used
Second 50 units - $0.439/units used
Excess units - $0.838/units used
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#include <stdio.h>
#include <stdlib.h>

int main (void)
{
    float amount, units;
    printf ("Enter the value of units: ");
    scanf ("%f", &units);
    (void) getchar ();
    amount=0;
    if(units<50)
        amount=units*0.153;
    if(units>=50&&units<100)
        amount=50.0*0.153+(units-50)*0.439;
    if(units>=100)
        amount=50.0*0.153+50.0*0.439+(units-100)*0.838;
    printf ("Value of amount: %g\n", amount);
    putchar ('\n');
    system ("pause");
    return EXIT_SUCCESS;
}