What does an entry in a Joomshopping template mean?

Question

Joomla

In the joomshopping template, after the output of a certain block, the output is:

//после блока с ценой
print $product->_tmp_var_bottom_price;
//после блока со старой ценой
 print $product->_tmp_var_old_price_ext;
//после блока с производителем
print $product->manufacturer_code;

etc.
What is it for