Funded Amount Meta

I’ve come up with a new question T_T

In the project setting (wp admin), I’d like to add the 3rd box show how the funded amount that the particular project got. The problem is I don’t know what variables to fill for that field.

<input type=”text” name=”f_target_amount” id=”f_target_amount” class=”widefat” value=”<?php echo esc_attr($settings[‘target’]);

Like for the 1st one, it is ‘f_target_amount’ and ‘$setting[‘target’]’.
I tried $funded_amount and funding_amount, but it did not work.