The numbers I added as 0 from the panel appear to be corrupted in the game. How can I solve this?

[Blocked Image: https://i.hizliresim.com/ha2o9p6.png]

How can I solve it?

$this->tplObj->assign_vars(array(
'points' => $USER['darkmatter'],
'km_1' => pretty_number($config->bonus_1_km_cost),
'metal_1' => pretty_number($config->bonus_1_metal),
'cristal_1' => pretty_number($config->bonus_1_cristal),
'deuterim_1' => pretty_number($config->bonus_1_deuterium),
'km_2' => pretty_number($config->bonus_2_km_cost),
'metal_2' => pretty_number($config->bonus_2_metal),
'cristal_2' => pretty_number($config->bonus_2_cristal),
'deuterim_2' => pretty_number($config->bonus_2_deuterium),
'km_3' => pretty_number($config->bonus_3_km_cost),
'metal_3' => pretty_number($config->bonus_3_metal),
'cristal_3' => pretty_number($config->bonus_3_cristal),
'deuterim_3' => pretty_number($config->bonus_3_deuterium),
'km_4' => pretty_number($config->bonus_4_km_cost),
'metal_4' => pretty_number($config->bonus_4_metal),
'cristal_4' => pretty_number($config->bonus_4_cristal),
'deuterim_4' => pretty_number($config->bonus_4_deuterium),
'km_5' => pretty_number($config->bonus_5_km_cost),
'bonus_5_fleet' => pretty_number($config->bonus_5_fleet),
'km_6' => pretty_number($config->bonus_6_km_cost),
'bonus_6_fleet' => pretty_number($config->bonus_6_fleet),
'km_7' => pretty_number($config->bonus_7_km_cost),
'bonus_7_fleet' => pretty_number($config->bonus_7_fleet),
'km_8' => pretty_number($config->bonus_8_km_cost),
'bonus_8_fleet' => pretty_number($config->bonus_8_fleet),

No matter what I do it doesn't work, how can I add it to this code?

<b><font color=yellowgreen>+ {$metal_4}</font><font color=yellow> {$LNG.tech.{901}}</b></font><br>