1 Tom Tom for 20 naira

In this country, I have witnessed so many things that disgust me. It's always just 'click ignore' for me. I can't ignore this, though. I just made a purchase of N4,980 at a corner store, and my change was N20. The woman inquired if I could buy anything for N20 and stated she didn't have any N20 to give me. "Give me, sweetie," I say. She also handed me one Tom Tom. She stated that the 1 Tom Tom was N20 when I enquired. I thought, What? Tom Tom, that's three for N10. What year is it, she asks? Please let me know how much one Tom Tom costs, my people.