Slaves were introduced to new diseases and suffered from malnutrition long before they reached the new world. It is suggested that the majority of deaths on the voyage across the Atlantic - the middle passage - occurred during the first couple of weeks and were a result of malnutrition and disease encountered during the forced marches and subsequent interment at slave camps on the coast. Conditions on the slave ships were terrible, but the estimated death rate of around 13% is lower than the mortality rate for seamen, officers and passengers on the same voyages.
The slaves were promised 40 acres and a mule. We use taxpayer dollars to buy land in Africa: 40 acres per former slave. The descendents of the slaves can divide it however they see fit.
There is only one caveat: to cash in, each descendent must renounce his or her citizenship and leave (after all, he / she wouldn't be here if not for slavery!)
Of course, once all of the reparations are paid, then we also have to dismantle all affirmative action, quotas, etc. These programs are allegedly to make up for past discrimination, and the reparations have atoned for that.