Mrs. Wood had $150.55 in her checking account as of Monday. She gave ⅕ to charity on Tuesday, she then gave ¼ of her remaining amount to her brother as a birthday present on Tuesday, and then spent $15.67 from her remaining amount on Wednesday. What is the new balance in Mrs. Wood's checking account?

Statements reasons 1. ab ? cd; ad ? bc 1. given 2. ac ? ac 2. reflexive property 3. ? adc ? ? cba 3. ? 4. ? dac ? ? bca; ? acd ? ? cab 4. cpctc 5. ? dac and ? bca are alt. int. ? s; ? acd and ? cab are alt. int. ? s 5. definition of alternate interior angles 6. ab ? cd; ad ? bc 6. converse of the alternate interior angles theorem 7. abcd is a parallelogram 7. definition of parallelogram what is the missing reason in step 3?