First, activate the collect money feature for your account. If you haven't set up payments for the account, click here to learn more.
From the Slots tab, add the title for your payment item, enter the # wanted, and assign the slot to the dates/times that apply to that item. Check the box to collect money and enter the specific details of that payment item. Click the green button at the bottom of the screen to save the details of this slot entry. You can then continue to add as many payment items to the sign up as needed.