diff --git a/charge/calculate.py b/charge/calculate.py
new file mode 100644
index 0000000..0c8601f
--- /dev/null
+++ b/charge/calculate.py
@@ -0,0 +1,59 @@
+from appPublic.log import debug, exception
+from ahserver.serverenv import ServerEnv
+from sqlor.dbpools import DBPools
+
+class PayeeCharge:
+	def __init__(self, resourceid, ctid):
+		self.resourceid = resourceid
+		self.ctid = ctid
+		
+	async get_ct_specs(self, sor):
+		sql = """select a.charge_type_spec_mode as spec_type, b.* 
+from charge_type a, charge_type_spec b
+where a.id = ${ctid} 
+	and a.id = b.ctid"""
+		ctspecs = await sor.sqlExe(sql, {'ctid': self.ctid})
+		return ctspecs
+
+	async def get_payee_charge_rules(self, sor, payee):
+		pcrs = await sor.R('payee_charge_rule', {
+			'resourceid': self.resourceid,
+			'ctid': self.ctid,
+			'payeeid': payee
+		})
+		return pcrs
+
+	def get_spec_by_ctsid(self, ctsid, ctspecs):
+		for spec in ctspecs:
+			if ctsid == spec.id:
+				return spec
+		return None
+
+	async def calculate_charge(self, sor, payeeids, data):
+		ctspecs = await self.get_ct_specs(sor)
+		charges = {}
+		for payeeid in payeeids:
+			charge_arr = []
+			pcrs = await self.get_payee_charge_rule(sor, payeeid)
+			for pcr in pcrs:
+				spec = self.get_spec_by_ctsid(pcr.ctsid, ctspecs)
+				if spec is None:
+					continue
+				charge = pcr.copy()
+				d = data.get(spec.spec_name)
+				if d is None:
+					continue
+				cnt = data.get(spec.count_name, 1)
+				if spec_mode == 'spec_name':
+					if d == pci.spec_value:
+						pci.amount = pcr.charge_amount * cnt
+				elif spec_mode == 'spec_amount':
+					if pcr.charge_unit is None or pcr.charge_unit == 0:
+						pci.charge_unit = 1
+					charge.amount = d * pcr.charge_amount / pcr.charge_unit
+				else:
+					continue
+				charge_arr.append(charge)
+			charges[payeeid] = charge_arr
+		return charges
+
diff --git a/charge/init.py b/charge/init.py
new file mode 100644
index 0000000..2d3cc3c
--- /dev/null
+++ b/charge/init.py
@@ -0,0 +1,6 @@
+from ahserver.serverenv import ServerEnv
+from charge.calculate import PayeeCharge
+def load_charge():
+	env = ServerEnv()
+	env.PayeeCharge = PayeeCharge
+