I don't know if your question is still active but for those who are experiencing similar situations as this gentleman...
By the isk/lp ratio you are showing I can tell you are most likely using very inefficient NPC Corp LP Stores for the courier bot. In that case please use a combination of:
evefight.com/ to get a generalization of 'possible' highly profitable corp LP Stores that fit your criteria.
www.fuzzwork.co.uk/lpstore/ to show a more detailed report on the corporation(s) you have selected.
Lastly and most importantly you
personally do a self check of these market places ingame.
Tips and Precautions.
Using these websites you may see a very good ISK/LP item but this item may be a very unreliable purchase. Maybe it has been severely inflated, the daily purchase quantities are too low to dump the product, etc.
When using search:
The 'Buying' search shows what current market orders people will buy your product. A guaranteed price for your product.
The 'Selling' search shows what current market orders people have in the market and the price they're selling for. A NOT guaranteed price for your product after competition marketing.
Want more of that LP?
Do level 4 mission, obviously.
Do not neglect your ship skills. It's not just about maxing Gallente Industrial and going about your day. Raise those core ship handling skills! Obviously the fast your ship goes the quicker your missions goes.
Spaceship Command - 2% bonus to ship agility per level
Evasive Maneuvering - 5% bonus to ship agility per level
Navigation - 5% Bonus to sub-warp velocity per level
Warp Drive Operation - 10% reduction to capacitor needed to warp per level
Negotiation - 5% increase to ISK and loyalty point rewards offered by mission agents per level
Advanced Skill....Infomorph Psychology - 1 additional jump clone per level. Allows use of jump clones. This skill will be your best friend out there. Seed those clones throughout the regions with moderate-high LP/ISK ratios. Sometimes the market takes a big turn right when you're sitting on the left. Chase it! Jump clone to those corps and get grinding. Save your previous LP/ISK you were working on for the turn back, the market moves in circles. Never get too anxious to sell at a lower price.
BTW I have no problem making a couple of Billions a month. According to my data sheet yesterday I 'potentially' made 561 million last night on a 12 hour circuit. Even I find that number to be a bit weary. In realization I usually make about 300 million on the buyer market.