Ah what you say is true, yes you've answered your question.
When lines are usually cut by a transversal , the transversal only cuts two parallel lines , therefore any alternate interior angles that you find are equal , the lines are always parallel.
Answer:
We write 4 times 4 because it includes 34,44,54,64in the data.
85.54+12.92 =98.46
100-98.46 =1.54
She gets $1.54 in change