Nuclear Fuel Cycles (class), Help (2)

[mullig2]

A nuclear power plant uses 87 tons of uranium in its core.  The first core consists of 3 equal batches with enrichments of 2.5, 2.9, and 3.1%.  For subsequent cycles, the reactor uses batches with enrichments equal to 2.6 and 3.2% in alternate years.  One third of the core is discharged each year and is replaced by new fuel.  Assume a 30-yr lifetime and 0.2% tails during the life of the plant.  Calculate:
(a) The number of SWUs needed for the 1^st core, the number of SWUs every year after the 1^st cycle, and the total SWUs over the life of the plant
(b) The amount of U₃0₈ and UF₆ needed for the 1^st core, every year after, and the total U₃0₈ and UF₆ over the life of the plant. Give your result in metric tons of uranium, UF₆, and U₃0₈
(c) Assume the following prices and calculate the cost of the 1^st core and the cost of the fuel per year for the life of the plant.
   U₃O₈: $40.00/kgU
   Enrichment: $80.00/SWU, 0.5% loss in conversion
   Conversion: $4.00/kgU
   Fabrication: $100.00/kgU, 0.85 loss in fabrication

[retired nuke]

OK, as much fun as your problems seem to be....
and as helpful as Nukeworkers try to be.... 
You may recognize that this isn't the "homework helpline" 

Both of your posts show problems that contain significant time consuming calculations. Perhaps if you phrased it in the form of a question regarding how to do the calculations, you would get some advice. But requesting us to do the homework for you is asking a bit much.
Good luck, maybe someone will be bored enough to work it out for you.