fix: fix conversion to be from unit USD

- updated the pricing policy and test

Author: 0oM4R

grid-client/calculator/calculate.go

@@ -51,10 +51,10 @@ func (c *Calculator) CalculateCost(cru, mru, hru, sru int64, publicIP, certified
 	if certified {
 		certifiedFactor = 1.25
 	}
-	// cost per month in mUSD
+	// cost per month in unit-USD
 	costPerMonth := (cu*float64(pricingPolicy.CU.Value) + su*float64(pricingPolicy.SU.Value) + ipv4*float64(pricingPolicy.IPU.Value)) * certifiedFactor * 24 * 30
 	// convert to USD
-	return costPerMonth / mUSDToUSD, nil
+	return costPerMonth / UnitFactor, nil
 }
 
 // CalculatePricesAfterDiscount calculates the prices after discount

grid-client/calculator/calculate_test.go

@@ -26,19 +26,19 @@ func TestCalculator(t *testing.T) {
 	sub.EXPECT().GetPricingPolicy(1).Return(substrate.PricingPolicy{
 		ID: 1,
 		SU: substrate.Policy{
-			Value: 2,
+			Value: 50000,
 		},
 		CU: substrate.Policy{
-			Value: 2,
+			Value: 100000,
 		},
 		IPU: substrate.Policy{
-			Value: 2,
+			Value: 40000,
 		},
 	}, nil).AnyTimes()
 
 	cost, err := calculator.CalculateCost(8, 32, 0, 50, true, true)
 	assert.NoError(t, err)
-	assert.Equal(t, cost, 16.65)
+	assert.Equal(t, 76.725, cost)
 
 	sub.EXPECT().GetBalance(identity).Return(substrate.Balance{
 		Free: types.U128{