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?
Loisa will pay a total of $40 x 4 = $
<gadget id="calculator">40*4</gadget>
<output>160</output>
160 for the first 4 months.
She will pay a total of $35 x 4 = $
<gadget id="calculator">35*4</gadget>
<output>140</output>
140 for the next four months.
And she will pay a total of $30 x 4 = $
<gadget id="calculator">30*4</gadget>
<output>120</output>
120 for the last four months.
Thus, she will pay a total of $100 + $160 + $140 + $120 = $
<gadget id="calculator">100+160+140+120</gadget>
<output>520</output>
520 for 12 months including the down payment.
Therefore, Loisa can save $520 - $450 = $
<gadget id="calculator">520-450</gadget>
<output>70</output>
70 if she buys the tablet in cash.

<result>70</result>