How much is this pen? It's cost 2500 dong

How much is the red hat? It's cost 21500 dong

to go : went

to cut : cut

to cat : cat

to buy : bought

to decide : decided

to eat : ate

to take : to took

to visit : visited

to put : put

to rent: mình ko bt

How much is this pen? It's cost $2500^{đ}$ 

How much is the red hat? It's cost  $21500^{đ}$

to go: went

to cut: cut

to cat: cat

to buy: bought

to decide: decided

to eat: ate

to take: took

to visit: visited

to put: put

to rent: rented

to learn: learned

to think: thought

to arrive: arrived

to see: saw

to watch: watched

Mấy từ còn lại mình ko nhìn được. Sr

Xin ctlhn ạ