No need to go to travel agency. they will going to charge you too much. You or your husband can sponsor her, visa for personal sponsor is only 200 riyals. All you need to do is to ask for an NOC from your sponsor company, prepare for an authenticated birth certificate of your daughter, your marriage contract(stamped by your embassy and Ministry of Foreign Affairs), copy of your labor contract, your company computer number (ask from your HR Dept.) and a filled-up arabic application form for a visit visa of your daughter. Then, go to Immigration department in Madinat Khalifa with your E-cash card or debit card (they'll not going to accept cash). Within a day if your documents are complete you can get the visa thru MOI website.