Correct

通共

/ tōng gòng / 
Strokes

Example

As an Adverb

altogether; in all

1
Tā
他
tōng
通
gòng
共
cái
才
yǒu
有
sì
四
běn
本
cídiǎn
词典
  
。

All told, he has only four dictionaries.

2
Tōng
通
gòngyǒu
共有
bā
八
gè
个
duì
队
cānjiā
参加
bǐsài
比赛
  
。

There are altogether eight teams participating in the tournament.