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_68 (population INTEGER, simplified VARCHAR, area VARCHAR)
### Question:
What's the sum of the population for the place simplified 上杭县 with an area smaller than 2,879?
### Answer:
SELECT SUM(population) FROM table_name_68 WHERE simplified = "上杭县" AND area < 2 OFFSET 879