Employers often use an online paycheck calculator, like PaycheckCity. They simply sign up for a free membership, and then select that calculator that's relevant to the pay status, like hourly or salary. They then enter wage and deductions information in order to calculate the paycheck. This calculator will then generate the payroll check stub, which can simply be printed and given to you. The employer will write the employer name and contact information, as well as the name of the employee on the pay stub.
Employers may make their own payroll check stub, too. They can use any spreadsheet program instead of using an online program. They will include the employer name as well as their contact information at the very top of the page, and then add the employee's name, their pay date and their pay period dates. They will make appropriate headings and columns, which will include regular hours, regular pay rate, regular gross wages, taxes, gross salary, voluntary deductions as well as net pay. The net pay is the gross pay of the employee, taking away deductions. They save this template and use it whenever they need to make a check stub - so if they've done this, your employer at 7 Eleven should be able to easily provide you with a check stub.
Employers sometimes use Microsoft Office online to create paycheck stub templates as well. The community users submit the templates, and all the employers have to do is tweak them to fit their requirements. Your employer should easily be able to provide you with the pay check stub that you need, and they have to do it for you anyway. Simply get in touch with your employer and they will be able to arrange something for you.