Below is an instruction that describes a task. Write a response that appropriately completes the request in Swahili. Please answer in Swahili.

### Instruction:
Tracy set up a booth at an art fair. 20 people came to look at her art. Four of those customers bought two paintings each. The next 12 of those customers bought one painting each. The last 4 customers bought four paintings each.  How many paintings did Tracy sell at the art fair?

### Response:
 Wateja wa kwanza walikununua michoro 4 * 2 = <<4*2=8>>8.
Wateja 12 waliobaki walikununua michoro 12 * 1 = <<12*1=12>>12.
Wateja wanne wa mwisho walikununua michoro 4 * 4 = 16.
Jumla ya michoro Tracy aliuza ni 8 + 12 + 16 = <<8+12+16=36>>36.