=> get INVENTORY values for following sku (PV01, LM01, KW01, ES01 and NM01) from db tables
   =>PV01 => fcsusdbadmin_notions_dropship.prevuepet_op
   =>LM01 => fcsusdbadmin_notions_dropship.sd300_notinv_inv
   =>KW01 => fcsusdbadmin_notions_dropship.sd300_notinv_inv
   =>ES01 => fcsusdbadmin_notions_dropship.sd300_notinv_inv
   =>NM01 => fcsusdbadmin_notions_dropship.sd300_notinv_inv
  
=> Read active inventory file (downloaded from Ebay) and get following sku (PV01,LM01,KW01,ES01 and NM01) with its inventory and price
   and calc 4th column with (price* inventory) and save

=>Compare skus from file with db sku 
  => remove those sku from file which are not in our db

=>Next if hour is 9 or 11 or 17 or 1 or 5 or 21
       => loop through NM01 data (from file) and get its inventory from db table
       =>if any sku inventory not found, we remove the underscore and extract the sku
                =>then get its inventory from db table
      =>Check if inventory from file and calculated inventory is different
                =>then we insert to total_sheet array
                => and add 4th column in total_sheet_Array with values from multiplying price with new inventory value.

=>Next we check if day is not sat nor sunday and hour is 15
        =>Loop through LM01 data (from file)
        => we calculate the inventory value
        =>Check if inventory from file and calculated inventory is different
                =>then we insert to total_sheet array
                => and add 4th column in total_sheet_Array with values from multiplying price with new inventory value.

=>Next we check if  hour is 1 or 3 or 5 or 7 or 11 or 13 or 15 or 17 or 19 or 21 or 23
       =>Loop through PV01 data( from file)
        => we calculate the inventory value
        =>Check if inventory from file and calculated inventory is different
                =>then we insert to total_sheet array
                => and add 4th column in total_sheet_Array with values from multiplying price with new inventory value.

=>Next we check if  hour is  1 or 11 or 17
        =>Loop through KW01 data( from file)
        => we calculate the inventory value
        =>Check if inventory from file and calculated inventory is different
                =>then we insert to total_sheet array
                => and add 4th column in total_sheet_Array with values from multiplying price with new inventory value.        

=>NOW FOR ES01 SKU
   =>   LOOping through es01 array(from file)
   =>Check if inventory from file and calculated inventory is different
                =>then we insert to total_sheet array
                => and add 4th column in total_sheet_Array with values from multiplying price with new inventory value.        

=>if suppose final_array is empty
         then we jst place the header inside the final_array.
    else 
         we calc limit from the existing active inv file  
         and we get new limit from the sum of newly calculate inventory  and multiplying with the price

    
 =>next we check if new limit > 30 lakhs or 3 million
               col= 4th column of total_sheet_array
               then we sort the 4th col values in desc order


            =>now looping through total_sheet_array
                   => if any value not set, we skip
                   => next we check nm01 sku 
                   => if nm01 skus are b2b, then we skip
                   => we reduce each sku's inventory by 1 value
                      and save it inside compare_qnty array

           if done for 1000 values
                    set counter to 0. 
                   calculate  new limit= array_sum ( 4th col of total_sheet_array) 
                   if new value < 29 lakhs
                      looping through compare_qnty
                          we check if inventory is same as before
                              then remove those values from final_array
                         else 
                             we set final_array with "Revise","itemid","qty"


 new limit is the new value (calc in steps above)
  if est == true
      we create the file upload.csv and fill the values from final_array
      then we upload this file using the script upload_inv.php
 
  else
      we display error file is not generated due to time zone