APK MOD INFO
Name of Game: Plumber Full
VERSION: 2.7.1

Name of the cheat, mod, or hack (credits: wendgames):
-MOD COINS

Plumber Full MOD APK 2.7.1 (Mod Coins)

Download the CACHE file/OBB file. They should be .zip or .rar files.
Extract the file to your sdcard.
Move the extracted folder to the location: /sdcard/Android/obb