Tonya makes and sells baby items. The table shows her costs and the amounts for which items were sold.
Tonya's Homemade Items
Cost to
Make
$10
$4
$11
$3
Price
Item
Pillow
Baby Blanket
Knitted Sweater
Bracelet
Sold
$12
$8
$19
How much profit did Tonya make during her sale?
A.
$17
B. $23
C.
$28
D.
$45

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?