For good life on your resin you should regenerate at least every 8 days. With your hardness, and I assume no iron or manganese, and assuming typical water usage of 60 gal per day per person your total hardness to remove every 8 days is 2 people x 60 gal/day/person x 8 grains/gal x 8 days =9680 grains. So I suggest you set your capacity to 10,000 grains, hardness to 8 grains, day override to 8, and set your salt dose to 3 lbs per regeneration. With these settings you should use approximately 3 lbs of salt per week and have soft water.
I should note that in theory you could use a slightly lower salt setting with SST-60 resin but the settings above should provide you with consistent soft water and reasonalbe use of salt.