しな at the end of a sentence


In the manga Yotsubato, the main character Yotsuba's father says
「ジャンボが二人分働くしな」. I understand the sentence as a whole, I think, but I don't
understand the しな at the end.

Here's the full dialogue:

> よつば：ジャンボ、しばらく見ないうちにまた大きくなった！  
>  ジャンボ：お？どこでおぼえたそのセリフ  
>  お父さん：まあいいか。ジャンボが二人分働くしな




  * 〜し〜し is a common pattern for listing things. Although the pattern strictly speaking requires at least two list items, in colloquial speech it often occurs by itself. Here, the previous discussion probably contains some things which are good about ジャンボ and the fact that he works for two is just another good thing about him.  
Related questions: (1) [Are there various ways to use
~し?](https://japanese.stackexchange.com/questions/1361/are-there-various-ways-
to-use-%E3%81%97), (2) [Joining adjectives with し before a
noun](https://japanese.stackexchange.com/questions/11209/joining-adjectives-
with-%E3%81%97-before-a-noun), (3) [The many ways to say "and" in
Japanese](https://japanese.stackexchange.com/questions/474/the-many-ways-to-
say-and-in-japanese?lq=1), (4) [What is the し particle and how do you use
it?](https://japanese.stackexchange.com/questions/13397/what-is-
the-%E3%81%97-particle-and-how-do-you-use-it)

  * な is a variant of ね.  
Related questions: (1) [What nuance does "ですな"
bring?](https://japanese.stackexchange.com/questions/6806/what-nuance-
brings-%E3%81%A7%E3%81%99%E3%81%AA), (2) [「ね」 vs 「な」 in 「そうだね」 /「そうね」/
「そうですね」](https://japanese.stackexchange.com/questions/13474/%E3%81%AD-
vs-%E3%81%AA-
in-%E3%81%9D%E3%81%86%E3%81%A0%E3%81%AD-%E3%81%9D%E3%81%86%E3%81%AD-%E3%81%9D%E3%81%86%E3%81%A7%E3%81%99%E3%81%AD)




“しな” = 接続助詞 “し” + 終助詞 “な”

“Aするしな。” implies something happens because of A. Your example implies “Because
ジャンボ works instead of someone (father?), he doesn’t have to work.”

