Correct

成总儿

/ chéng zǒngr / 
Strokes

Example

As an Adverb

altogether; in all

1
Chéng
成
zǒngr  
总儿
fùzhàng
付账

pay in a lump sum

As an Adverb

in batches; in large amounts/numbers

2
Chéng
成
zǒngr  
总儿
mǎi
买
zhè
这
pī
批
huò
货
jīngjì
经济
hésuàn
合算
  
。

It is more economical to purchase the goods in large amounts.