"Maybe you're right, robot guy!" Lisa nodded and slapped the handlebars. "I'll give you the motorcycle back, but since there's a big dent in the side of the car, you understand, you'll have to pay me 70 Bitpounds."
"What? 70 Bitpounds!" exclaimed the robot boy, but Lisa was unfazed. Business is business, she thought. "For that much, they could repaint the whole car, robot girl! Let's make it 50!" the robot boy tried to negotiate.
"80," Lisa said with an indifferent face
"What?? But you just said seventy a moment ago," the other one was surprised.
"Did I? ... All right, let's make it seventy, but just for you, and I won't budge any further," Lisa threw in, while toyed with the palm of her hand.