Company C produces toy trucks at a cost of Tk. 5 each for the first 100 trucks and Tk. 3.5 for each additional truck. If 500 toy trucks were produced by the company C and sold for Tk. 10 each, what was company C's gross profit?
Correct Answer: Tk. 3100
<math xmlns = "http://www.w3.org/1998/Math/MathML"><mi>H</mi><mi>i</mi><mi>n</mi><mi>t</mi><mi>s</mi><mo>:</mo><mo> </mo><mi>C</mi><mo> </mo><mi>এ</mi><mi>র</mi><mo> </mo><mtext>toy trucks বাবদ উৎপাদন খরচ </mtext><mfenced open = "{" close = "}"><mrow><mn>100</mn><mo>×</mo><mn>5</mn><mo> + </mo><mfenced><mrow><mn>500</mn><mo> - </mo><mn>100</mn></mrow></mfenced><mo>×</mo><mn>3</mn><mo>.</mo><mn>5</mn></mrow></mfenced><mtext> টাকা</mtext><mspace linebreak = "newline"/><mo> = </mo><mfenced><mrow><mn>500</mn><mo> + </mo><mn>1400</mn></mrow></mfenced><mo> </mo><mtext>টাকা  = 1900 টাকা</mtext><mspace linebreak = "newline"/><mi>C</mi><mo> </mo><mi>এ</mi><mi>র</mi><mo> </mo><mi>t</mi><mi>o</mi><mi>y</mi><mo> </mo><mi>t</mi><mi>r</mi><mi>u</mi><mi>c</mi><mi>k</mi><mi>s</mi><mo> </mo><mi>এ</mi><mi>র</mi><mo> </mo><mtext>বিক্রয়মূল্য </mtext><mfenced><mrow><mn>500</mn><mo>×</mo><mn>10</mn></mrow></mfenced><mtext> টাকা = 5000 টাকা</mtext><mspace linebreak = "newline"/><mo>∴</mo><mo> </mo><mi>C</mi><mi>o</mi><mi>m</mi><mi>p</mi><mi>a</mi><mi>n</mi><mi>y</mi><mo> </mo><mi>C</mi><mo> </mo><mi>এ</mi><mi>র</mi><mo> </mo><mi>g</mi><mi>r</mi><mi>o</mi><mi>s</mi><mi>s</mi><mo> </mo><mi>p</mi><mi>r</mi><mi>o</mi><mi>f</mi><mi>i</mi><mi>t</mi><mo> </mo><mfenced><mrow><mn>5000</mn><mo> - </mo><mn>1900</mn></mrow></mfenced><mo> </mo><mtext>টাকা = 3100 টাকা</mtext><mspace linebreak = "newline"/></math>