Answer:
$746.90
Step-by-step explanation:
The old monthly payment can be derived from the information given in the scenario:
It says that ''at the end of 1 year he owes the bank $70,000'' and we are also told that ''he paid $10.67 monthly per thousand on his original loan.''
Logically then, the old monthly payment = $10.67 per $1,000 into $70,000
Old monthly payment = ($70,000 / $1,000) x $10.67
which is 70 x $10.67 = $746.90