// Writen by Jeremy Raleigh
// Purpose is to calculate the fees for ELISA testing

function calculate_fees()
{
  calc_form = document.fee_calculator;
  herdsize = calc_form.herd_size.value;

  //check and make sure a herd size was entered
  if (herdsize == "")
  {
     alert("Please enter a herd size ...");
     calc_form.herd_size.focus();
     return false;
  }
  //perform the calculations
  dry_test_costs = Number(herdsize * calc_form.dry_test_cost.value);
  whole_test_costs = Number(herdsize * calc_form.whole_test_cost.value);
//  dry_test_costs = 0;
  
//  dry_vet_costs = Number(herdsize * (calc_form.dry_vet_labor.value / 30));
//  whole_vet_costs = Number(calc_form.whole_vet_labor.value);
  dry_vet_costs = 0;
  whole_vet_costs = 0;
  
  dry_farm_collection_labor = Number(herdsize * (calc_form.dry_farm_labor_collection.value / 30));
  whole_farm_collection_labor = Number(calc_form.whole_farm_labor_collection.value);
  //dry_farm_collection_labor = 0;
  
  dry_farm_handling_labor = Number(herdsize * (calc_form.dry_farm_labor_handling.value / 30));
  whole_farm_handling_labor = Number(calc_form.whole_farm_labor_handling.value);
  //dry_farm_handling_labor = 0;
  
  dry_collection_supplies = Number(herdsize * calc_form.dry_collection_supplies.value);
  whole_collection_supplies = Number(calc_form.whole_collection_supplies.value);
  //dry_collection_supplies = 0;
  
  dry_shipping = Number(5 + (herdsize / 100) * calc_form.dry_shipping.value);
  whole_shipping = Number(calc_form.whole_shipping.value);
//  dry_shipping = 0;
  
  dry_lab_fees = Number(calc_form.dry_lab_fees.value);
  whole_lab_fees = Number(calc_form.whole_lab_fees.value);
  //dry_lab_fees = 0;
  
  serum_elisa = Math.round(dry_test_costs + dry_vet_costs + dry_farm_collection_labor + dry_farm_handling_labor + dry_collection_supplies + dry_shipping + dry_lab_fees);
  milk_elisa = whole_test_costs + whole_vet_costs + whole_farm_collection_labor + whole_farm_handling_labor + whole_collection_supplies + whole_shipping + whole_lab_fees;
 
  calc_form.serum_elisa_cost.value = "$ " + serum_elisa;
  calc_form.milk_elisa_cost.value = "$ " + milk_elisa;

  return true;
}