Lab3-Delivery Charge

int space = 50;
void setup() {
  size(650, 300);
  background(#DDFFFF);
  int x =50, y =50;

  int packageType = 2;
  int serviceType = 3;
  float weight = 16;

  fill(0);
  textSize(40);
  text("Expressimo Delivery Service", x, y);
  charge(x+space, y+space, packageType, serviceType, weight);
}

void charge(int x, int y, int package_type, int service_type, float weight) {
  float cost =0;
  fill(#FF0000);
  textSize(30);
  if (package_type == 1) {
    text("Package : LETTER", x, y);
    if (service_type == 1) {
      text("Service : Next day Priority", x, y+space);
      if (weight <= 8) {
        cost = 12;
      } else {
        cost = 0;
      }
    } else if (service_type == 2) {
      text("Service : Next day Standard", x, y+space);
      if (weight <= 8) {
        cost = 10.5;
      } else {
        cost = 0;
      }
    } else if (service_type == 3) {
      text("Service : No Service", x, y+space);
    } else {
      text("Service : ERROR", x, y+space);
    }
    text("Weight : "+weight+" Oz", x, y+space*2);
  } else if (package_type == 2) {
    text("Package : BOX", x, y);
    if (service_type == 1) {
      text("Service : Next day Priority", x, y+space);
      if (weight <= 1) {
        cost = 15.75;
      } else {
        cost = cal_service1(weight);
      }
    } else if (service_type == 2) {
      text("Service : Next day Standard", x, y+space);
      if (weight <= 1) {
        cost = 13.75;
      } else  {
        cost = cal_service2(weight);
      }
    } else if (service_type == 3) {
      text("Service : Two-days", x, y+space);
      if (weight <= 1) {
        cost = 7.00;
      } else  {
        cost = cal_service3(weight);
      }
    } else {
      text("Service : ERROR", x, y+space);
    }
    text("Weight : "+weight+" Pound", x, y+space*2);
  } else {
    text("Package : ERROR", x, y);
  }
  text("Charge : $"+cost, x, y+space*3);
}
float cal_service1(float weight) {
  float priority_charge;
  float firstCharge = 15.75;
  priority_charge = firstCharge + ((weight-1)*1.25);
  return priority_charge;
}

float cal_service2(float weight) {
  float standard_charge;
  float firstCharge = 13.75;
  standard_charge = firstCharge + ((weight-1)*1);
  return standard_charge;
}

float cal_service3(float weight) {
  float twodays_charge;
  float firstCharge = 7.00;
  twodays_charge = firstCharge + ((weight-1)*0.5);
  return twodays_charge;
}