i test it but here is a problem and i can't fix it . when we start and click to buy and then exit the game and back again we don't have problem .
1: don't touch any thing and exit again for 10 seconds , when games open our total change , refresh game(or click play on C2) total return to true number.
2: don't touch any thing and refresh game the amount come back again, build time too.
i'm exporting to apk file and i'm testing on device (the problems had exist)
i try to say the system when build time = 0 ,set total = itemvalue + amount ,but this is have problem too.