Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE table_name_19 (no_built INTEGER, unit_nos VARCHAR)
### Question:
How many number Builts had unit numbers of 375301-310?
### Answer:
SELECT SUM(no_built) FROM table_name_19 WHERE unit_nos = "375301-310"