係羅湖入閘，之後再係羅湖出閘,收幾錢?

盛惠港幣＄18.8，多謝！

http://www.kcrc.com/html/tch/services/services/east_rail/fare/images/er_fare.pdf
根據乘客須知6，原站出入只須付最低車資，即$3.20。

It just counts you the price as from Sheung Shui to Lo Wu.
(That means $18.8)

It costs $18.8 (octopus)

For further details, you can refer to this website www.kcrc.com.hk

會收最低車費,即$3.9(頭等是$7.8)

最低收費
$18.8(八仔價)~