When demand for Mara Coffee Roasters' specialty coffee bags increased in 2022, the firm expanded its production capacity. Table 1 shows the weekly output and average cost per bag in Kenyan Shillings (Ksh) for 2021 and 2022.
Table 1
| 2021 | 2022 | |
|---|---|---|
| Weekly output (bags) | 600 | 900 |
| Average cost per bag (Ksh) | 1,200 | 1,000 |
Calculate the change in weekly total costs in Kenyan Shillings (Ksh) between 2021 and 2022. You are advised to show your workings.