like: 多退少补 → →
多退少补 [duo1 tui4 shao3 bu3] ☊ 
to either refund an overcharge or ask for a surcharge in case of a price change ☊ 多退少补 [duo1 tui4 shao3 bu3] ☊ to either refund an overcharge or ask for a surcharge in case of a price change ☊