Calculate the incremental costs for each of the following price rages of specialty rotary cutting disks. Answer in excel

$1-50$ $$1\mathrm{.}00$ per disk

$51-100$ $$0\mathrm{.}81$ per disk

$101-120$ $$0\mathrm{.}79$ per disk

$121-1000$ $$0\mathrm{.}76$ per disk

$1001-5000$ $$0\mathrm{.}71$ per disk

$5001+$ $$0\mathrm{.}69$ per disk