Noun charge per unit has 1 sense
  1. rate, charge per unit - amount of a charge or payment relative to some basis; "a 10-minute phone call at that rate would cost $5"
    --1 is a kind of charge
    --1 has particulars:
     pay rate, rate of pay; payment rate, rate of payment, repayment rate, installment rate; tax rate; interest rate, rate of interest; freight, freightage, freight rate; rate of depreciation, depreciation rate; rate of exchange, exchange rate; excursion rate; footage; linage, lineage; room rate
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