Okay. To answer this question, we have to multiply the amount of pens bought by the price of them, because you paid 59 cents each for 12 pens. 0.59 * 12 = 7.08. The 12 pens cost $7.08. Sofia paid that with a $10 bill, so we have to subtract the price for the pens from 10. 10 - 7.08 = 2.92. There. Sofia will receive $2.92 in change.
