jì / rán / yǐ / jīng / bāng / le / tā / zhè / me / duō / bù / rú / sòng / fó / sòng / dào / xī / bǎ / zuì / hòu / yī / jiàn / shì / yě / zuò / wán

既然已经帮了他这么多，不如送佛送到西，把最后一件事也做完。

Since you've already helped him this much, you might as well see it through and finish the last thing.