so, so far, this is what it looks like
Rent -RD 6,810, or less
Food-RD 10,215 or less
Phone, internet, and electricity, RD 3,500
Rent - Doable
Food - wery much doable, if you will not drink and smoke or do drugs
see my previous reply, I would say you should be fine with about 7,000 per month on food, among cooking and takeout food.
Phone + internet - the simplest plan with 384 kbps Internet will cost you about 1200 pesos, cellphone with 150 minutes about 800 pesos, and electricity without A/C about 800 to 1000 pesos. Total = about 3,000 pesos.
My electric bill now runs about 1500 pesos, have quite some juice sucked, inverter charges, and use AC at night for several hours. My daily usage is on avergae 10 kilowatthours.