Add December 14 payment for @sebastiansanchez123

contributor-lists/sebastian-sanchez-list.mediawiki

@@ -20,9 +20,9 @@ Total money earned as income: $18269
 
 Forward balance carried over from 2018: ($3252.83)
 
-Payment made: $14509.47
+Payment made: $19549.47
 
-Net payment due: $506.70
+Net payment due: ($4443.30)
 
 === Completed pages paid for by Vipul (Timelines Wiki) ===
 
@@ -192,7 +192,7 @@ From April 2019 onward, the rule of thumb for stipend is: $4/hour if all hours w
 
 === Payment schedule ===
 
-Total paid: $14509.57
+Total paid: $19459.57
 
 The amount a payment is for will be treated as the value in USD at market rates of the received ARS at time of exchange. Thus, Vipul will bear the cost of transfer overhead (both exchange rate costs and overhead).
 
@@ -208,6 +208,8 @@ The amount a payment is for will be treated as the value in USD at market rates
 
 * $4950 sent Sunday, August 25, 2019, received Monday, August 26, 2019. Sent $4950 + $20 transaction fees via Western Union, receiver got 271770.03 ARS. The exchange rate used by Western Union matches the market exchange rate at the time
 
+* $4950 sent Saturday, December 14, 2019, received Monday, December 16, 2019. Sent $4950 + $40 transaction fees via Western Union, receiver got 354370.50 ARS. The exchange rate used by Western Union matches the market exchange rate at the time
+
 == Work in 2018 ==
 
 Total money earned as income: $18876

sql/payments.sql

@@ -45,6 +45,7 @@ insert into payments(payment_method, payee, intermediary, sent_date, payment_not
   ('PayPal','Sebastian Sanchez',NULL,'2019-08-03','2019-08-03','2019-08-03','2019-08-03',-33.45,-35.30,-1.85,-33.45,'Payee returns money via PayPal after we determined that the PayPal transaction fees were too high for the PayPal transfer to be cost-effective'),
   ('Western Union','Sebastian Sanchez',NULL,'2019-08-11','2019-08-11','2019-08-12','2019-08-12',692.92,708,8,700,'Payee gets 31496.46 ARS. $692.92 is calculated as 31496.46 ARS at the exchange rate at the time of transfer (1 ARS = 0.022 USD)'),
   ('Western Union','Sebastian Sanchez',NULL,'2019-08-25','2019-08-25','2019-08-26','2019-08-26',4950,4970,20,4950,'Payee gets 271770.03 ARS. The exchange rate used by Western Union matches the market exchange rate at the time of transfer (1 USD = 54.63 ARS)'),
+  ('Western Union','Sebastian Sanchez',NULL,'2019-12-14','2019-12-14','2019-12-16','2019-12-16',4950,4990,40,4950,'Payee gets 354370.50 ARS. The exchange rate used by Western Union matches the "true" market exchange rate at the time of transfer (1 USD = 71.59 ARS)'),
 
   /* Ethan Bashkansky payments */
   ('Cash','Ethan Bashkansky','Issa Rice','2016-02-17','2016-02-17','2016-02-17','2016-02-17',115,115,0,115,NULL),