Min / Max/ Avg ticket sales by month

I feel like I'm missing something really simple, but I can't seem to get this set up. I'm trying to set up widgets for each month that show the total ticket sales for our museum admissions, the avg by day, the min we had by day, and the max we had by day for that month. I've tried moving things to categories and values and the best I get is one field saying 1, which is not right. I'm starting with setting up one widget for the month, but ultimately I'd also like to have one widget for all 12 of the fiscal year with all the figures. Thank you in advance for any ideas you may have.

Anne