Hide StoreNumber;
if (count(Stores[StoreNumber == input.StoreNumber]) > 0)
{
//get record from Stores Table
thisStore = Stores [StoreNumber == input.StoreNumber];
etc. etc.
if (count(Stores[StoreNumber == input.StoreNumber]) > 0)
{
//get record from Stores Table
thisStore = Stores [StoreNumber == input.StoreNumber];
hide StoreNumber;
etc. etc.