Which of the following calculates a sole trader’s net profit for a period?

A、Closingnetassets+drawings–capitalintroduced–openingnetassets;
B、Closingnetassets–drawings+capitalintroduced–openingnetassets;
C、Closingnetassets–drawings–capitalintroduced–openingnetassets;
D、Closingnetassets+drawings+capitalintroduced–openingnetassets