Events related to the buy and sale of goods in January 2020 of BLN company are as follows:

Date	Process	Amount	Unit Price	Amount
January 1	Stock	20	40.000,00	800.000,00
January 7	Sell	8	60.000,00	480.000,00
January 15	Buy	20	45.000,00	900.000,00
January 20	Sell	10	60.000,00	600.000,00
January 30	Sell	15	65.000,00	975.000,00

Calculate the amount of gross profit as of the end of January, assuming that the business uses the continuous inventory method;

a) calculate according to the moving weighted average cost method.

b) calculate according to the first-in-first-out (FIFO) method.

c) calculate according to the last input first output (LIFO) method.