This chart was created as part of my classroom economy. There are classroom jobs for each one or two students in my class. The chart specifies the expectation for each of the jobs, as well as how much money students can earn for successful completion of their job.
The second page goes over a list of ways that students can earn credits or have to pay debits. The requirements become more of a challenge as the year progresses. :)
Students in my class keep track of their earnings/debits in a "checkbook" (mini notepad). We have a classroom store once every 2-4 weeks where students can shop with their money.
You can edit the document to your classroom specifics.