Calculate commission per lot

[Scalper8]

Hi 

I want to Calculate commission per lot/lot size. The broker I use charges $3.5 per lot, now the problem I'm having is I'm not sure if the calculation below is correct for commission. 

I use the following before calculating commission:

double LotSize()
 {
  double LotStep=MarketInfo(Symbol(),MODE_LOTSTEP);
  double LotSize1=NormalizeDouble(AccountEquity()*Risk*LotStep,5);
  
  if(LotSize1<MarketInfo(Symbol(),MODE_MINLOT))
  {
   LotSize1=MarketInfo(Symbol(),MODE_MINLOT);
  }
  
  else if(LotSize1>MarketInfo(Symbol(),MODE_MAXLOT))
  {
   LotSize1=MarketInfo(Symbol(),MODE_MAXLOT);
  }
  
  return(LotSize1);
  
 }

To adding commission:

double LotSizeCommission()
 {
  double LotSize2=0;
  
  double TickValue=MarketInfo(Symbol(),MODE_TICKVALUE);
  double StopLoss=1.5;
  double Risk=0.25;
  double Commission=3.5;
  
  double LotStep=MarketInfo(Symbol(),MODE_LOTSTEP);
  LotSize2=NormalizeDouble(AccountEquity()*Risk*LotStep,5)/(StopLoss+Commission)*TickValue;//1000;
  
  if(LotSize2<MarketInfo(Symbol(),MODE_MINLOT))
  {
   LotSize2=MarketInfo(Symbol(),MODE_MINLOT);
  }
  
  else if(LotSize2>MarketInfo(Symbol(),MODE_MAXLOT))
  {
   LotSize2=MarketInfo(Symbol(),MODE_MAXLOT);
  }
  
  return(LotSize2);
 } 

Is this correct? Please assist if its incorrect