Assuming a unitary elastic demand and supply, a tax on the sellers of coffee will cause the price the buyer pays to and the price the seller receives to .

Assuming a unitary elastic demand and supply, a tax on the sellers of coffee will cause the price the buyer pays to increase and the price the seller receives to decrease.

Here's why:

1. When a tax is imposed on sellers, they are likely to pass on some or all of this tax to the buyers in the form of higher prices. This is because the tax increases the cost of production for the sellers.

2. The increase in price will reduce the quantity demanded by the buyers, according to the law of demand. This is because buyers are sensitive to price changes when demand is unitary elastic.

3. On the other hand, the price that the seller receives after paying the tax is lower than the price the buyer pays. This is because the tax is subtracted from the price that the seller receives.

4. Therefore, the price the buyer pays increases and the price the seller receives decreases.

5. The exact amount of the price increase for the buyer and the price decrease for the seller depends on the elasticity of demand and supply. If demand and supply are unitary elastic, the tax burden is split evenly between the buyer and the seller.