How much gold does it take to complete common and epic tasks

how much gold does it really take to complete all tasks below legendary tasks has anyone figured this out

It costs 2,610,000 gold to complete all basic tasks of one colour.
It costs 5,250,000 gold to complete all epic tasks of one colour.

2,610,000 x 6 + 5,250,000 x 6 = 47,160,000 gold


tyvm for that info