دعوة للجميع :صحح اخطاءك :كل من لدية جملة يكتبها هنا

[ابو بيشو]

I prefer to pay by cash.
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I prefer to pay in cash.
I prefer to pay cash.
pay by cheque, pay by credit card BUT pay in cash or just pay cash:
'If you pay (in) cash, you might get a discount.'