PHP Notice in Debug log mode

While checking up my site with debug log on, I’ve encountered these PHP notices:

Notice: A non well formed numeric value encountered in \wp-content\plugins\msrp-for-woocommerce\includes\class-alg-wc-msrp-core.php on line 701

(i.e. 701. $diff = $msrp - $price;)

Notice: A non well formed numeric value encountered in \wp-content\plugins\msrp-for-woocommerce\includes\class-alg-wc-msrp-core.php on line 708

(i.e. 708. round( $diff / $msrp * 100, $this->options['msrp_display'][ $section_id ]['you_save_round'] ),

Maybe it also has something to do with the other issue that I’ve mentioned in a previous topic regarding rounding values which still don’t work properly?

Thanks