Hi Adrasteia,
Hope you'll be doing fine. While deciding on the offer, the main thing which matters is how do you find this package compared to the opportunities you may have in your own country? If it looks tempting and intriguing then consider it otherwise don't.
Coming to the cost of living, it's a bit messed up these days due to high inflation, so make sure that you are paid you salary in USD or if in SDG, then at prevailing black market rate at month end.
Secondly you must work out some arrangement to remit money back to your country should you require so, normally it is currently almost impossible to make a remittance from Sudan through a bank (because of sanctions and all).
No. 3, do ask your employer about any potential tax liabilities and make sure whatever amount you agree upon is post tax deduction (if applicable).
Coming to cost of living, as far as groceries are concerned they are not hugely expensive. Let me give you an idea based on current black market rate for USD (39 SDG for 1 USD). These were the prices when I went last time for groceries. Prices, in dollar terms however, don't fluctuate much.
Lean Meat (Beef): 4.8 USD/Kg
Boneless Chicken: 3.0 USD/Kg
Eggs: 2 USD for a pack of 30
Sliced Bread: 64 cents/loaf
Packed Milk: 87 cents/liter
Youghurt: 1.15 USD/liter
19 Liters Bottle of Mineral Water: 1.15 USD (plus 6 dollars one time deposit).
Potatoes: 64 cents/kg
Tomatoes: 1.2 USD/kg
Onions: 55 cents/kg
Apples: 5 USD/Kg
Bananas: 50 cents/Kg
Mangos: 1.3 USD/Kg
Flour: 55-60 cents/kg
Sugar: 60 cents/kg
Cooking Oil (Sunflower): 1.5 USD/Liter
Cold Drinks: 15-20 cents for 300 ml cans
Cab Fares (Like Uber etc): around 15-20 cents per Km.
I think this will give you a fair idea to calculate cost of living. As far as accommodation is concerned, it really depends upon what type of residence you chose, but furnished apartments are expensive. A 1 bedroom, hall and kitchen apartment may cost around 350-400 USD/month. Some people also share apartments which can help lower costs. Utilities are relatively cheap. I have a big apartment with my family of 4, but never had to spend over 100 USD for electricity.
Finally, international schools are really expensive. Are they giving 1100 dollars/year or for just one time? In any case, most international schools charge around 5000 USD/year for kindergarten. I think its better to contact them personally to get a fair idea.
I hope this info will help you to make a decision. If you have any further queries, please feel free to ask.
Regards,
Ahsan.