Sweets Sharing Puzzle

Two kids (who are not goats), Alice and Bala, have 100 sweets to share between themselves. However, they cannot agree on how to split the shares. Because of their arguing, a random authority figure arrives to impose order. The authority figure demands for Alice to make a sharing proposal (in the form of a sweet split) to Bala, who then has the choice to accept the proposal or not. If Bala does not accept the proposal, he can then make a counter-offer to Alice. This process of offering and counter-offering proceeds back and forth until a proposal is accepted. However, the authority figure, for his troubles, will levy a "friendliness tax" of 20 sweets each time a proposal or counter-proposal is rejected, thus reducing the number of sweets to be shared.

Now, assuming that both Alice and Bala are perfect logicians, and that their aim is to maximize their sweets, what sweet split would Alice make as her first proposal?