Monthly Amounts Automagically

One-Time Amount Monthly Amount
$3 $2
$4, $5 $3
$10 - $15 $5
$25 $10
$33 $10
$50 $15
$69 $15
$85 $20
$100 $20
$123 $20
$245 $20
$250 $40
$300 $45
$367 $50
$400 $55
$500 $65
$599 $70
$600 $70
$750 $85
$1000 $100
$1200 $100