+function get_purchase_value($stock_id)
+{
+ $sql = "SELECT purchase_cost FROM
+ ".TB_PREF."stock_master WHERE stock_id = ".db_escape($stock_id);
+
+ $result = db_query($sql,"retreive stock purchase price");
+ $row = db_fetch_row($result);
+ return is_array($row) ? $row[0] : false;
+}
+
+function update_purchase_value($stock_id, $price)
+{
+ $price = round2($price, user_price_dec());
+ $sql = "UPDATE ".TB_PREF."stock_master SET purchase_cost=".db_escape($price)
+ ." WHERE stock_id=".db_escape($stock_id);
+ db_query($sql, "The stock master purchase_cost cannot be updated");
+}