Charge delivery.

void setup() {
  size(900, 500);
  background(#FFFFFF);
  fill(0);
  textSize(25);
  charge_delivery(2, 13, 6);
}

//cal
void charge_delivery(int p, int s, int w) {
  //Choose package
  text("Choose 1 is Letter", width/100, height/4);
  text("Choose 2 is Box", width/100, (height/4)+50);
  //Choose type
  text("Choose 11 is Next Day Priority", width/100, (height/4)+100);
  text("Choose 12 is Next Day Standard", width/100, (height/4)+150);
  text("Choose 13 is 2-Day", width/100, (height/4)+200);
  line ((width/2)-10, 0, (width/2)-10, height);

  //cal
  if (p == 1) {
    if  (s == 11) {
      if    (w > 0 && w <= 8) {
        text("You choose package : Letter", (width/100)+500, (height/4)+50);
        text("You choose service : Next Day Priority", (width/100)+500, (height/4)+100);
        text("Weight :  "+w+"  oz", (width/100)+500, (height/4)+150);
        text("Total : $12", (width/100)+500, (height/4)+200);
      }
    }
  }

  if (p == 1) {
    if  (s == 12) {
      if    (w > 0 && w <= 8) {
        text("You choose package : Letter", (width/100)+500, (height/4)+50);
        text("You choose service : Next Day Standard", (width/100)+500, (height/4)+100);
        text("Weight :  "+w+"  oz", (width/100)+500, (height/4)+150);
        text("Total : $10.5", (width/100)+500, (height/4)+200);
      }
    }
  }
  if (p == 1) {
    if  (s == 13) {
      if    (w > 0 && w <= 8) {
        text("Not available", (width/100)+500, (height/4)+100);
      }
      if (w > 8) {
        text("Overweigth!!!", (width/100)+500, (height/4)+100);
      }
      if (w <= 0) {
        text("Total : $0", (width/100)+500, (height/4)+100);
      }
    }
  }
  if (p == 2) {
    if  (s == 11) {
     
        text("You choose package : Box", (width/100)+500, (height/4)+50);
        text("You choose service : Next Day Priority", (width/100)+500, (height/4)+100);
        text("$15.75 for the first pound.", (width/100)+500, (height/4)+150);
        text("Charge $1.25", (width/100)+500, (height/4)+200);
     
    }
  }
  if (p == 2) {
    if  (s == 12) {
     
        text("You choose package : Box", (width/100)+500, (height/4)+50);
        text("You choose service : Next Day Standard", (width/100)+500, (height/4)+100);
        text("$13.75 for the first pound.", (width/100)+500, (height/4)+150);
        text("Charge $1", (width/100)+500, (height/4)+200);
     
    }
  }
  if (p == 2) {
    if  (s == 13) {
     
        text("You choose package : Box", (width/100)+500, (height/4)+50);
        text("You choose service : 2-Day", (width/100)+500, (height/4)+100);
        text("$7 for the first pound.", (width/100)+500, (height/4)+150);
        text("Charge $0.5", (width/100)+500, (height/4)+200);
    }
  }
  if(p!=1 && p!=2 || s!=11 && s!=12 && s!=13){
    text("Have no data", (width/100)+500, (height/4)+100);
  }
}