Difference between customer and costumier

[phoienx]

English Grammar Tests, Elementary Level

ESL/EFL Test #16 "Learn it by heart", question 7

We are really glad to have you as our ......... and we will take good care of you.

(a) containers
(b) customers
(c) costumiers

English Grammar Tests, Elementary Level

ESL/EFL Test #16 "Learn it by heart", answer 7

We are really glad to have you as our customers and we will take good care of you.

Correct answer: (b) customers
_________________________

wahat is the diffrenc between customers and costumiers?

[Yankee]

.
Dictionaies are always helpful.
.
costumiers
.
customers

(Click on the words.)

[Suren]

Could you explain me please why "customers" is not the proper answer here?

[Skrej]