table{
  border-style: solid;
  border-color: black;
  border-width: 5px;
  border-radius: 5px;
  background-color: silver;
}
#subBtn{
  border-style: solid;
  border-color: black;
  border-width: 2px;
  border-radius: 5px;
}
#taxBtn{
  border-style: solid;
  border-color: black;
  border-width: 2px;
  border-radius: 5px;
}
#gtotalBtn{
  border-style: solid;
  border-color: black;
  border-width: 2px;
  border-radius: 5px;
}