Unmodified oligos are priced per base at the yield you receive, desalted, which is what most PCR and sequencing work needs. Anything carrying a dye, a quencher or an attachment group costs the synthesis plus that modification — a phosphate and a Cy5 are not the same job, so they are not the same price.
There is no price list to read here. Configure any item in this family in the order builder — sequence, yield, purification and modifications — and the price appears as you go, with the full breakdown, before anything is added to an order.