Can you help me make a formula?

I need a formula for my game show which is called... Deal or No Deal...

But, I can't think of one formula for how the banker will decide to deal...

Can you give me one?

Notes:

Set transferamount[1] = 0
Set transferamount[2] = 1
Set transferamount[3] = 5
Set transferamount[4] = 10
Set transferamount[5] = 25
Set transferamount[6] = 50
Set transferamount[7] = 75
Set transferamount[8] = 100
Set transferamount[9] = 200
Set transferamount[10] = 300
Set transferamount[11] = 400
Set transferamount[12] = 500
Set transferamount[13] = 750
Set transferamount[14] = 1000
Set transferamount[15] = 5000
Set transferamount[16] = 10000
Set transferamount[17] = 25000
Set transferamount[18] = 50000
Set transferamount[19] = 75000
Set transferamount[20] = 100000
Set transferamount[21] = 200000
Set transferamount[22] = 300000
Set transferamount[23] = 400000
Set transferamount[24] = 500000
Set transferamount[25] = 750000
Set transferamount[26] = 1000000

I can take any idea, and any additions...

Please, +rep...

you could think about a random number, checking the cases which are already opened, if they are the low ones the the banker gives a higher offer lets say random number between highest of the lowest opened cases and lowest of the closed cases, hope u understand^^

amount of money left to win / amount of bags left

and then, you round downwards

Make a unit for each value, place them somewhere you can't see them and add them all to a unit group. Then when the player picks a bag you just grab a random unit from the unit group and there is your money amount.

Either that or you make one unit with the Zone Indicator model and place 26 of them in the map and add them to a unit group. Set their Custom Values to the different amounts. Then when the player picks a bag you just grab a random unit from the unit group and there is your money amount in the units custom value.

Custom value is set via triggers (Unit - Set Cusom Value).

The name, the values and the randomness you want reminds me of a swedish tv series that went on air a while ago. The players picked a random bag and they won a random amount of money. Never saw the point in watching it. It was called Deal or no Deal to.

Searching the internet if found this formula:

$12,275.30 + (.748 * expected value) + (-2714.74 * number of cases left) + ( -.040 * maximum value left ) + (.0000006986 * expected value squared ) + ( 32.623 * number of cases left squared )

So i thing you should go with what Razorbrain said.