How to record transaction with vouchers and cash

Suppose I have 2 vouchers, each one equals to $100.
I bought something which cost $250, and I paid using 2 vouchers and $50 cash.
How do I record this transaction?

I use a separate account for vouchers from cash account. It seems one transaction binds to only one account. I want to use two accounts in one transaction this case.

Thanks for your help.