codyc1515: I have compiled a comparison of the costs of an iPhone 4 on the Vodafone Smart1 plan here: http://www.codycooper.co.nz/vf-table.html. (External link as you can't embed tables here)
I'm not quite sure what your table is showing..
Taking your example though and assuming a time frame of 24months
1 month contract $45 x 24 + $1099 for handset = $2179 or effectively $90.79/mth
12 month contract $40 x 24 + $1099 for handset = $2059 or effectively $85.79/mth
24 month contract $45 x 24 + $999 for handset = $2079 or effectively $86.63/mth
So the best option is to lock into the 12mth contract and buy the handset outright, logic prevailing the $40/mth cost should carry on for life of plan so it becomes the most economic option
Take the Smart $85 option though
1 month contract $85 x 24 + $1099 for handset = $3139 or effectively $130.79/mth
12 month contract $70 x 24 + $1099 for handset = $2779 or effectively $115.79/mth
24 month contract $85 x 24 + $699 for handset = $2739 or effectively $114.13/mth
Crunch the numbers and you can save 5% by locking in on Smart$45 and 10% on Smart$85
The handset subsidy only plays part of the value proposition