FLR (M) Application Lead to Wrong IHS Fee

Hi,

I was filling out the family route application form for an extension for the remaining 2.6 years. Accidently some of the questions I have answered were wrong because of that it did not ask me to add dependent details (daughter under 18 years) as a part of the application but paid the IHS Fee for myself which is £1560

Next time I made a fresh application again with the expert's help and answered all the questions correct this time I have managed to add dependent details in this application and it is asking to pay the IHS fee for both (Summing up the total for both) which is £2735.00

I can't afford to pay £2735 as I have already paid for myself in the old/wrong application but in the new application I can only put one IHS number not two numbers in the given textbox

Please guide me on how to proceed further with paying only my daughter's IHS Fee of £1175.00 and attach it to the same application. Shall I pay it separately and write a covering letter or Is there any other procedure for doing it? Please Help Thanks