Laundry isn't cheap. The price is per item. Here is a few item prices. You should get a good idea of what other things cost.
Pair of socks... $1.00
Shorts ... $3.00
Underware ... $1.25
Pants ... $3.50
Dry cleaning... A suit will cost you $7.00. A pair of slacks ... $4.50
If you have a balcony I would suggest bringing some laundry detergent along and washing items in the sink. Things dry very quickly over a chair on a balcony. If you don't have a balcony there is a drying line in your shower.
Hope this helps.