Would like some help with descriptive adjectives in a quiz question

[Tinagik]

Hello. While I am a native speaker of English, I got stuck on this question (on a quiz I am correcting for my students). I would appreciate some help, if possible!

This a grammar quiz question from a ECPE (Michigan Proficiency) GCVR Exam. Here it is:

"Which walkman did you end up getting?"
"The _______ one".

a. oval inexpensive yellow
b. yellow inexpensive oval
c. inexpensive yellow oval
d. oval inexpensive yellow

(a. and b. are the same answer, so this is a typo.)

The correct answer is: C (according to my teacher's manual!) I am not sure why it's the correct answer, unless there has been another typo. I guess I can understand "inexpensive" being first, since we could say it constitutes an opinion. What's inexpensive to someone, may be expensive to another person. So, given the order of descriptive adjectives:(Opinion or judgment, Size, Age, Shape, Color, Nationality, Material, Purpose or Qualifier )--wouldn't the correct answer be: "inexpensive, oval, yellow"? (which is not found as an option). I thought that shape comes before color, unless there is an exception to the rule here.

Can anyone help me with this? Thank you for your time, Tina

[Mister Micawber]

.
Adjective order is not set in stone; there is some slack which can be taken up by other things like rhythm, speaker's image, etc, and to me both inexpensive yellow oval and inexpensive oval yellow sound reasonably normal. The problem with this kind of exercise is that none of them sound really right because we don't really speak in adjective chains:

A: Which Walkman did you end up getting?
B1: That cheap yellow one-- you know, the oval one.
B2: That cheap oval one-- you know, the yellow one.
.
_________________
Native English teacher at Mister Micawber's

[Tinagik]

Thank you for responding, Mr. Micawber, and so quickly too! You're right--we don't speak using these long adjective chains. Your example makes a lot more sense, than the actual answer choices. Thank you for your help. I will explain this to my students today.

Thank you again.

Happy New Year!

Tina:)