Need min VP approval when Expense item violated and exceed amount is more than 1000 Dollar

Need minimum Vice president approval when Expense item is violated and exceed amount is more than 1000 Dollar

Let's say Expense item amount is 200 Dollar and as per policy, amount allowed is 150 Dollar then I want to write BPM Approval to send approval to VP when Exceeded amount (50 Dollar) i up to 1000 Dollar