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

### Instruction:
Loisa wants to buy a tablet that costs $450 cash. Since she does not have enough money, the store offered her an installment plan for 12 months. She will pay $100 as a down payment and pay $40 for the first 4 months; then $35 for the next four months; then $30 for the last four months. How much will Loisa save if she will buy the tablet in cash instead of on installment?

### Response:
 Loisa anapaswa kulipa jumla ya $40 x 4 = $<<40*4=160>>160 kwa miezi 4 ya kwanza.
Anapaswa kulipa jumla ya $35 x 4 = $<<35*4=140>>140 kwa miezi 4 inayofuata.
Anapaswa kulipa jumla ya $30 x 4= $<<30*4=120>>120 kwa miezi 4 za mwisho.
Hivyo, atafanya malipo jumla ya $100 + $160 + $140 + $120 = $520 kwa miezi 12 ikiwa ni pamoja na malipo ya awali.
Hivyo, Loisa anaweza kuokoa $520 - $450 = $<<520-450=70>>70 ikiwa atanunua kompyuta kwa pesa taslimu.