function keisan()
{
	n = 1;
	chk = document.Kyori;
	for (i=0; i<3;i++) if (chk[i].checked) n = n * eval(chk[i].value);
	chk = document.Kaisuu;
	for (i=0; i<3;i++) if (chk[i].checked) n = n * eval(chk[i].value);
	m = 0;
	chk = document.Weight;
	for (i=0; i<4;i++) if (chk[i].checked) m = eval(chk[i].value);

	var kihon = document.Waribiki.kihon
	var jibaiseki = document.Waribiki.jibaiseki
	var juuryouzei = document.Waribiki.juuryouzei
	var inshidai = document.Waribiki.inshidai
	var wari = document.Waribiki.waribiki
	var syurui = document.Waribiki.syurui 
	var houteihiyou = document.Waribiki.houteihiyou

	if(n > 4) kihon.value = 21500;
	else if(n == 1) kihon.value = 8800;
	else if(m == 1) kihon.value = 13500;
	else if(m == 2) kihon.value = 14500;
	else kihon.value = 15500;

	if(m == 1) jibaiseki.value = 18980;
	else jibaiseki.value = 22470
	
	var juuryou = new Array(8800, 25200, 37800, 50400);
	juuryouzei.value = juuryou[m-1];

	inshidai.value = 1100;

	houteihiyou.value = eval(jibaiseki.value) + eval(juuryouzei.value) + eval(inshidai.value)

	n = 0;
	chk = document.Daisya;
	for (i=0; i<2;i++) if (chk[i].checked) n +=eval(chk[i].value);
	chk = document.Nyuuko;
	for (i=0; i<2;i++) if (chk[i].checked) n +=eval(chk[i].value);
	chk = document.Pair;
	for (i=0; i<2;i++) if (chk[i].checked) n +=eval(chk[i].value);

	if(kihon.value == 8800) wari.value = 0;
	else if(kihon.value == 21500){
		chk = document.Nissuu;
		for (i=0; i<5;i++) if (chk[i].checked) n +=eval(chk[i].value);
		wari.value = n;
	}
	else wari.value = n;

	document.Waribiki.goukei.value = eval(kihon.value) + eval(jibaiseki.value) + eval(juuryouzei.value) + eval(inshidai.value) - eval(wari.value)

	if(kihon.value == 8800) syurui.value = "ベスト30分車検"
	else if(kihon.value == 21500) syurui.value = "ベスト1日車検"
	else syurui.value = "ベスト60分車検"
}