Table schema:
CREATE TABLE table_name_4 (quantity_rebuilt VARCHAR, type VARCHAR, railway_number_s_ VARCHAR)

Question: What is the total of quantity rebuilt if the type is 1B N2T and the railway number is 88, 118?
SQL: SELECT COUNT(quantity_rebuilt) FROM table_name_4 WHERE type = "1b n2t" AND railway_number_s_ = "88, 118"