किन्हीं दो पक्षों के बीच लिखित आर्थिक समझौते के लिए किस शब्द का प्रयोग किया जाता है?

Which of the following is a key feature of the 'Barter system'?

__________ refers to the portion of disposable income that is not spent on consumption.

Being busy in labour with the objective of earning bread is the synonym of .