What is wrong with my code that my test class output does not match the expected values?

public class ShuttleBatteryMonitor $\{$

private int shortRate;

private int shortLimit;

private int longRate;

private int chargeCapacity;

private int numPassengers;

private int currLocation;

private int chargeLevel;

private int numTrips;

private int totalChargeUsage;

public ShuttleBatteryMonitor$($int shortRate, int shortLimit, int longRate, int chargeCapacity$)\{$

this.shortRate $=$ shortRate;

this.shortLimit $=$ shortLimit;

this.longRate $=$ longRate;

this.chargeCapacity $=$ chargeCapacity;

numPassengers $=0$;

currLocation $=0$;

chargeLevel $=$ chargeCapacity;

numTrips $=0$;

totalChargeUsage $=0$;

$\}$

public void travelTo$($int destination$)\{$

travelToHelper$($destination$,$ shortLimit, shortRate$)$;

$\}$

public void travelTo$($int destination, int shortLimitOverride, int longRateOverride$)\{$

travelToHelper$($destination$,$ shortLimit, shortRate$)$;

$\}$

private void travelToHelper$($int destination, int shortLimitOverride, int longRateOverride$)\{$

int distance $=$ Math.abs$($currLocation $-$ destination$)$;

currLocation $=$ destination;

int shortRateUsage $=$ numPassengers $*$ shortRate $*$ Math.min$($shortLimitOverride$,$ distance$)$;

int longRateUsage $=$ numPassengers $*$ longRate $*$ Math.max$($distance $-$ shortLimitOverride, $0)$;

int batteryUsageForCurrentTrip $=$ shortRateUsage $+$ longRateUsage;

chargeLevel $-=$ batteryUsageForCurrentTrip;

numTrips$++$;

totalChargeUsage $+=$ batteryUsageForCurrentTrip;

$\}$

public void recharge$()\{$

currLocation $=0$;

chargeLevel $=$ chargeCapacity;

$\}$

public void loadPassengers$($int netAddedPassengers$)\{$

numPassengers $+=$ netAddedPassengers;

if $($numPassengers $<0)\{$

numPassengers $=0$;

$\}$

$\}$

public int getLocation$()\{$

return currLocation;

$\}$

public int getPassengerCount$()\{$

return numPassengers;

$\}$

public double getChargeRemaining$()\{$

double remainingCharge $=(($double$)$ chargeLevel $/$ chargeCapacity$)*100\mathrm{.}0$;

remainingCharge $=($int$)(10*$ remainingCharge$)/10\mathrm{.}0$;

return remainingCharge; $//$ TODO: Replace this placeholder

$\}$

public double getAverageUsagePerTrip$()\{$

$//$ TODO: Your implementation goes here

if $($numTrips $==0)\{$

return $0$; $//$ TODO: Replace this placeholder

$\}$

return $($double$)$ totalChargeUsage $/$ numTrips;

$\}$

public int getEstimatedTripsRemaining$()\{$

if $($getAverageUsagePerTrip$()==0)\{$

return $0$; $//$ TODO: Replace this placeholder

$\}$

return $($int$)($chargeLevel $/$ getAverageUsagePerTrip$())$;

$\}$

$\}$