"that's all she wrote"

[Baubau]

English Language Tests, Intermediate level

ESL/EFL Test #687 "English Slang Idioms (429)", question 6

"Well, that's all she .......... The suite is all finished and ready for the tenant," Max announced to his workers.

(a) wrote
(b) sang
(c) did
(d) said

English Language Tests, Intermediate level

ESL/EFL Test #687 "English Slang Idioms (429)", answer 6

"Well, that's all she wrote. The suite is all finished and ready for the tenant," Max announced to his workers.

Correct answer: (a) wrote

Your answer was: incorrect
"Well, that's all she said. The suite is all finished and ready for the tenant," Max announced to his workers.
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I apologize, but I don't find any meaning in this. Is "that's all she wrote" an expression?

Thanks in advance.

[Mister Micawber]

Yes. 'That's all she wrote' is a fixed expression:

That's all she wrote! (American informal)
something that you say when something has come to an end and there is nothing more that you can say about it We went out twice - once to the movies and once to a restaurant and that's all she wrote.
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Native English teacher at Mister Micawber's