Simple If/Min Formula

Hello forum users.

Although I can't provide a copy of my spreadsheet I will do my best to explain the result I am trying to achieve

Okay

There is a main limit of $700.00
There is a sub limit of $300.00

The benefits are 60% of the charge up-to the limits

Quote first item under main limit $1,000.00.

Quote second item under sub limit $400.00

I have an initial min formula based on sub limit to give result based on the lower of the limit remaining or 60% of the cost.

The result is $300.00 as the limit is less than 60% of the cost

The main limit is calculated based on two other formulae

It needs to be reduced by the benefit paid already under the sub limit i.e $700.00-$300.00.

Balance of main limit $400.00

The second formula needs to calculate the minimum of 60% of cost (1K) or remaining limit (after deduction of sub limit) being $300.00.

So final formula needs to calculate 60% of 1k or limit (minimum of), being $300.00.

60% of 1K is $600.00 however limit remaining after deduction of sub limit is $300.00, so benefits paid $300.00 & both limits now show as zero

Hope this makes sense

I have been getting a circular error as I am using the cell where the balance remaining of the main limit is twice for the main & sub limits linked

How can I get around this?

Thank you