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These costs are incurred only when the machine is used. Variable costs include repair and maintenance, fuel and lubricants, servicing and labour charges.
7, 8, 12, 21, 37, ?
{(522 – 482 ) ÷ (27 + 73)} × 35 = ?% of 175
If 1210 ÷ 22 + 1332 ÷ 37 - y + 54 × 3 = 980 ÷ 20 × 144 ÷ 48, then the value of y is:
226 x 15 - 11 x 99 + (41)2 = ?
(65% of 120) = 25% of ? - 22
5234 + 1562 + 2359 − 5893 = 3167 − 121 + ?3
(30% of 400 - 20% of 540 + 35% of 1000) = ?
? = √2704 ÷ (25% of 104) + 73
(√1296 – 12) × 5 = ? + 40